Unable to add a Music folder if Import from iTunes is checked

Hello,
I have soft of a workflow so when I'm at the computer I prefer iTunes and when I'm not at home I prefer Plex Music (got a lifetime PlexPass so why pay for iTunes Match correct?)

When I try to add the iTunes folder with Import from iTunes checked, when I press Add Library it just spins and never adds the Library. I left it for hours (around 50 gb of music) and no CPU activity. I also tried adding the user/Music/iTunes/iTunes Media/Music beside the user/Music/iTunes and neither of the 2 work. I'd like to have it synced the recently added albums so it's the same as iTunes (that's why I check Import from iTunes).

Any ideas?

Thanks!