I have a 2012 Mac mini (i7 2.3ghz, 16RAM, 500SSD) running as my PLEX server -- Cat5e to 24port NetGear Switch -- Drobo 5N with a Share with all my Movies. I can only play content on the actual Mac mini, I am not able to watch on my phone, Chrome Cast, or remote web on laptop; it says "please check that the file exists and the necessary drive is mounted."
I can confirm that the files do exist and the drive is mounted. What am I missing?