I don't have an answer for you...
However, I did note that you are using PG. To that end, make sure to update the driver:
Not possible right now without a plugin, you can wait for https://github.com/NodeBB/NodeBB/issues/7217 to be implemented
barisusakli created this issue in NodeBB/NodeBB
make "allow group creation" a global privilege
@julian It's in a container created by the plugin which also is meant to tie it to the forum container. I think you are right that it can't interpret the address correctly as I just tried a clean install but this time with mongodb and that plugin and had the exact same issue.