I am far from a expert as i’ve only been running nextcloud on SCALE for about 2 weeks now.
If this is a new install of nextcloud i mostly followed the Documentation (it has been updated recently according to a reply on another topic) but what i had to change from the the Documentation is:
nexcloud appdata, etc - left on default ixVolume
nextcloud user data storage - pointed to a host path
postgres data storage - left on default ixVolume
postgress backup - pointed to a host path
the Documentations says point all these to host paths created but it did not work that way for me.
From other Thread nextcloud can take more than a while to deploy (10-15min + is possible, if you select the Pre V2 option it could take even longer) depending on your PC Specs and storage options selected.
Also there is a caching issue on TrueNAS where browsers don’t always reload the Deploying to Running. You can follow the steps provided by another user to force a correct reload.
Hope this Helps.