ok .. I did finally get it to work. I deleted everything... docker, poortainer, all the images... the whole #!.
I only used docker-compose and the .yml file following the instructions from ....
Not sure if any of this helped but I cleared my browser cache and waited a bit after restarting nextcloud.
I want to thank Soma for the above link and now I'm off to do what I really wanted to do in the first place .... Plex!!!!
I'm sure I'll have some issues with that. I use NFS shares from 2 WDMyclouds . One is the older 4.xx firmware and the other has the new OS 5 on it. Seems they are both happy using NFS v4. The new OS 5 has a newer version of Twonky:
WD MyCloud v5.12.108 Twonky Server 8.5.2-3
WD MyCloud v04.05.00-342 Twonky Version: 7.2.9-15
You can tell if you have a older Mycloud by looking at the end of the PN:
-00 = Gen1 <<< do not try to upgrade to OS5 >>>
-10 = Gen2 <<< can be ugraded to OS5 >>>
The newer Twonky made a difference ... I have an 2013 Sony BD/DLNA player that kinda limps along. With the higher resolution videos it struggled. With the newer twonky several videos that barely sorta played cleaned right up and ran fine.