[Can't create new folders in share]

I know it's a long shot but did you every find a permanent solution?

[[Support] Linuxserver.io - Plex Media Server]

Anyone else having their library scan hanging up and getting stuck scanning random movies after this latest update? 
I've tried several fixes and work arounds. about to just roll back a couple versions.  

[Can't access Nextcloud from local LAN]

So, I figured this out.

I have fios and a g3100. There is hairpin NAT enabled on every port, except 443. My router used port 443 for their own things and monitoring and would not let it work. I changed the port they use to another one (while remembering and savinging it because it was now the new access point for my router). Now 443 works perfectly. 

You can also change the port that nextcloud uses to something else too. 

 

[Can't access Nextcloud from local LAN]

I'm in the same boat. I'm searching for an answer that'll work