I got the above error after reinstalling flex server. I have come back to using it after some time and I could not get the web interface to connect to the server (accessing it locally). Since I couldn't fix the issue I uninstalled following the official flex instructions and then reinstalled (I have done this twice more now to no avail). I can't get past this error message.
Log files:
Jan 13, 2016 18:42:23 [0x10e56f000] INFO - Plex Media Server v0.9.14.6.1620-e0b7243 - Apple Mac - build: darwin-x86_64 macosx
Jan 13, 2016 18:42:23 [0x10e56f000] INFO - MacOSX version: 10.10.5
Jan 13, 2016 18:42:23 [0x10e56f000] INFO - Processor Intel(R) Xeon(R) CPU E5540 @ 2.53GHz
Jan 13, 2016 18:42:23 [0x7fff7875b300] DEBUG - NetworkInterface: Notified of network changed (force=0)
Jan 13, 2016 18:42:23 [0x7fff7875b300] DEBUG - Network interfaces:
Jan 13, 2016 18:42:23 [0x7fff7875b300] DEBUG - * 1 lo0 (127.0.0.1) (loopback: 1)
Jan 13, 2016 18:42:23 [0x7fff7875b300] DEBUG - * 4 en0 (192.168.1.210) (loopback: 0)
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - BPQ: [Idle] -> [Starting]
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Opening 20 database sessions to library, SQLite 3.8.9, threadsafe=1
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Installing Library Database from [/Applications/Plex Media Server.app/Contents/Resources/com.plexapp.plugins.library.db] to [/Users/oliver/Library/Application Support/Plex Media Server/Plug-in Support/Databases/com.plexapp.plugins.library.db]
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Running migrations.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Running migration 20151111185126.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 0.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 1.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 2.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 3.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 4.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 5.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 6.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 7.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 8.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 9.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 10.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 11.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 12.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 13.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 14.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 15.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 16.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 17.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 18.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Captured session 19.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Completed migration 20151111185126.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - ChangestampAllocator: initialized to 0
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Using a generated machine identifier, firstRun=1 hackintosh=0.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Listening on port 32400 with queue of 128 connections.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Listening on port 32401 with queue of 128 connections.
Jan 13, 2016 18:42:24 [0x10eaf3000] DEBUG - Auth: Refreshing tokens inside the token-based authentication filter.
Jan 13, 2016 18:42:24 [0x10edc2000] DEBUG - Auth: Refreshing tokens inside the token-based authentication filter.
Jan 13, 2016 18:42:24 [0x10eec8000] DEBUG - File /Applications/Plex Media Server.app/Contents/Resources/Plug-ins-e0b7243 changed: -1 => 1450824423.
Jan 13, 2016 18:42:24 [0x10eec8000] DEBUG - File /Users/oliver/Library/Application Support/Plex Media Server/Plug-ins changed: -1 => 1452710544.
Jan 13, 2016 18:42:24 [0x10eec8000] DEBUG - Scanning for plug-ins in /Applications/Plex Media Server.app/Contents/Resources/Plug-ins-e0b7243
Jan 13, 2016 18:42:25 [0x10eec8000] DEBUG - Scanning for plug-ins in /Users/oliver/Library/Application Support/Plex Media Server/Plug-ins
Jan 13, 2016 18:42:25 [0x10eec8000] DEBUG - Starting plug-in /Applications/Plex Media Server.app/Contents/Resources/Plug-ins-e0b7243/System.bundle.
Jan 13, 2016 18:42:25 [0x10eec8000] DEBUG - [com.plexapp.system] Setting plug-in to always running (daemon mode).
Jan 13, 2016 18:42:25 [0x10eec8000] DEBUG - Starting file watcher for com.plexapp.system
Jan 13, 2016 18:42:25 [0x10eec8000] DEBUG - Spawned plug-in com.plexapp.system with PID 795
Jan 13, 2016 18:42:25 [0x10eec8000] DEBUG - [com.plexapp.system] Sending command: GET /:/prefixes
Jan 13, 2016 18:42:29 [0x10efce000] DEBUG - Crash Reporter: Starting up.
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - Reading 486 bytes in the body, code is 200
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - [com.plexapp.system] Plug-in running on port 49688.
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - * Plug-in handles prefix: /system
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - * Plug-in handles prefix: /player
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - Read configuration for [com.plexapp.system], had 2 prefixes
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - Updating [com.plexapp.system] in the database, it has changed.
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - Done with 1 synchronous plug-in starts, starting the rest in parallel.
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - Updating the list of agents known by the system.
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - [com.plexapp.system] Sending command over HTTP (GET): /system/agents
Jan 13, 2016 18:42:33 [0x10eec8000] DEBUG - HTTP requesting GET http://127.0.0.1:49688/system/agents
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Found 1 library files
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Found 103 genre icons
Jan 13, 2016 18:42:33 [0x10a43d000] DEBUG - File /Users/oliver/Music/iTunes/iTunes Music Library.xml changed: -1 => 1452709260.
Jan 13, 2016 18:42:33 [0x10a43d000] INFO - DatabaseLoader::handleChangedFile(0x105902a08)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - iPhoto: Found 0 library files
Jan 13, 2016 18:42:33 [0x10a43d000] DEBUG - iTunes: Reading XML files...
Jan 13, 2016 18:42:33 [0x10a43d000] DEBUG - iTunes: Reading XML file: /Users/oliver/Music/iTunes/iTunes Music Library.xml
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Aperture: Found 0 library files
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Image transcode cache directory: /Users/oliver/Library/Caches/PlexMediaServer/PhotoTranscoder
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Cleaning old transcode directories.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Creating NetworkServices singleton.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - NetworkServices: Initializing...
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048ac800: Creating new Network Service and registering for notifications.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048ac800: NetworkService got notification of changed network (first change: 1)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - NetworkService: Quick dispatch of network change.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048f5200: Creating new Network Service and registering for notifications.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048f5200: NetworkService got notification of changed network (first change: 1)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - NetworkService: Quick dispatch of network change.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048ea000: Creating new Network Service and registering for notifications.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048ea000: NetworkService got notification of changed network (first change: 1)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - NetworkService: Quick dispatch of network change.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048c8000: Creating new Network Service and registering for notifications.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x1048c8000: NetworkService got notification of changed network (first change: 1)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - NetworkService: Quick dispatch of network change.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x104936800: Creating new Network Service and registering for notifications.
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - 0x104936800: NetworkService got notification of changed network (first change: 1)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - NetworkService: Quick dispatch of network change.
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - Network change for advertiser.
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Setting up multicast listener on 0.0.0.0:32414 (outbound: 0)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - Network change for advertiser.
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Setting up multicast listener on 0.0.0.0:32410 (outbound: 0)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - Network change for advertiser.
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Setting up multicast listener on 0.0.0.0:32412 (outbound: 0)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Network change for browser (polled=0), closing 0 browse sockets.
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Setting up multicast listener on 0.0.0.0:32413 (outbound: 0)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Browsing on interface 127.0.0.1 on broadcast address 127.255.255.255 (index: 0)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Browsing on interface 192.168.1.210 on broadcast address 192.168.1.255 (index: 1)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Network change for browser (polled=1), closing 0 browse sockets.
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Browsing on interface 127.0.0.1 on broadcast address 127.255.255.255 (index: 0)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkService: Browsing on interface 192.168.1.210 on broadcast address 192.168.1.255 (index: 1)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - NetworkServiceBrowser: SERVER arrived: 192.168.1.210 (vOSX)
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - Notifying the system bundle an update to server /system/notify/serverUpdated?host=192.168.1.210
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - [com.plexapp.system] Sending command over HTTP (GET): /system/notify/serverUpdated?host=192.168.1.210
Jan 13, 2016 18:42:33 [0x10f051000] DEBUG - HTTP requesting GET http://127.0.0.1:49688/system/notify/serverUpdated?host=192.168.1.210
Jan 13, 2016 18:42:33 [0x10a43d000] DEBUG - iTunes: Loading tracks...
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Gracenote Version 3.07.7.3686 (build: 2015-07-05 11:52-0700)
Jan 13, 2016 18:42:33 [0x10eaf3000] DEBUG - Gracenote: Using SQLite 3.8.9
Jan 13, 2016 18:42:33 [0x10edc2000] ERROR - SQLITE3:0x10eaf2350, 14, cannot open file at line 31186 of [8a8ffc862e]
Jan 13, 2016 18:42:33 [0x10edc2000] ERROR - SQLITE3:0x10eaf2350, 14, os_unix.c:31186: (2) open(/Users/oliver/Library/Caches/PlexMediaServer/gn_lists.gdb) - No such file or directory
Jan 13, 2016 18:42:34 [0x10eaf3000] DEBUG - Starting HTTP server.
Jan 13, 2016 18:42:34 [0x10eaf3000] DEBUG - Running server...
Jan 13, 2016 18:42:34 [0x10eaf3000] DEBUG - Waiting for server condition to be signaled.
Jan 13, 2016 18:42:34 [0x10f1d7000] DEBUG - Set up a thread pool for HTTP server with 2 threads.
Jan 13, 2016 18:42:34 [0x10f154000] DEBUG - DLNA server starting.
Jan 13, 2016 18:42:34 [0x10f154000] DEBUG - Job running: '/Applications/Plex Media Server.app/Contents/MacOS/Plex DLNA Server'
Jan 13, 2016 18:42:34 [0x10f4c3000] DEBUG - Request: [127.0.0.1:49683] GET /:/plugins/com.plexapp.system/messaging/function/X0J1bmRsZVNlcnZpY2U6QWxsU2VydmljZXM_/Y2VyZWFsMQoxCmxpc3QKMApyMAo_/Y2VyZWFsMQoxCmRpY3QKMApyMAo_ (2 live) GZIP
Jan 13, 2016 18:42:34 [0x10f546000] DEBUG - Request: [127.0.0.1:49684] GET / (3 live) GZIP
Jan 13, 2016 18:42:34 [0x10f5c9000] DEBUG - Request: [127.0.0.1:49685] GET /:/plugins/com.plexapp.agents.fanarttv (4 live) GZIP
Jan 13, 2016 18:42:34 [0x10f64c000] DEBUG - Request: [127.0.0.1:49686] GET / (5 live) GZIP
Jan 13, 2016 18:42:34 [0x10f6cf000] DEBUG - Request: [127.0.0.1:49687] GET /servers (7 live) GZIP
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Request: [127.0.0.1:49691] GET /servers (7 live) GZIP
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale ar
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale cs_CZ
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale da
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale de
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale en
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale es
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale fr
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale he
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale hr_HR
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale hu_HU
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale it
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale ko
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale lt
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale nl
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale nl_BE
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale no
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale pt_BR
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale sr
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale sv
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - Translator: Found locale zh_CN
Jan 13, 2016 18:42:34 [0x10f64c000] DEBUG - It took 0.0 sec to serialize a list with 15 elements.
Jan 13, 2016 18:42:34 [0x10f546000] DEBUG - It took 0.0 sec to serialize a list with 15 elements.
Jan 13, 2016 18:42:34 [0x10f6cf000] DEBUG - It took 0.0 sec to serialize a list with 1 elements.
Jan 13, 2016 18:42:34 [0x10f752000] DEBUG - It took 0.0 sec to serialize a list with 1 elements.
Jan 13, 2016 18:42:34 [0x10f5c9000] WARN - Request for plug-in [com.plexapp.agents.fanarttv] but it doesn't exist.
Jan 13, 2016 18:42:34 [0x10f4c3000] DEBUG - [com.plexapp.system] Sending command over HTTP (GET): /:/plugins/com.plexapp.system/messaging/function/X0J1bmRsZVNlcnZpY2U6QWxsU2VydmljZXM_/Y2VyZWFsMQoxCmxpc3QKMApyMAo_/Y2VyZWFsMQoxCmRpY3QKMApyMAo_
Jan 13, 2016 18:42:34 [0x10f4c3000] DEBUG - HTTP requesting GET http://127.0.0.1:49688/:/plugins/com.plexapp.system/messaging/function/X0J1bmRsZVNlcnZpY2U6QWxsU2VydmljZXM_/Y2VyZWFsMQoxCmxpc3QKMApyMAo_/Y2VyZWFsMQoxCmRpY3QKMApyMAo_
Jan 13, 2016 18:42:34 [0x10ec7c000] DEBUG - Completed: [127.0.0.1:49685] GET /:/plugins/com.plexapp.agents.fanarttv (7 live) GZIP 213ms 313 bytes 404
Jan 13, 2016 18:42:34 [0x10ecff000] DEBUG - Completed: [127.0.0.1:49687] GET /servers (7 live) GZIP 211ms 452 bytes 200
Jan 13, 2016 18:42:34 [0x10ecff000] DEBUG - Completed: [127.0.0.1:49691] GET /servers (7 live) GZIP 211ms 452 bytes 200