I have an Enterprise 10.7 installation running on Linux with a postgresql DBMS, I'm connected to the server via VPN. Same enterprise installation as some time ago...
While the installation itself seems to be running fine now and I was able to create a couple of enterprise gdbs over the last few months, suddenly (I just tried over the weekend again after some time not working on it) I cannot create an enterprise gdb any longer in ArcPro 2.4 but it still works totally fine in ArcMap 10.7.
The Error Messages in ArcPro are not very specific (not to say totally useless...):
Sometime I also get a bad login user message but I always copy/paste my user passwords so I don't see a reason why it should be a user issue. It stopped after restarting the computer from what I can tell.
Connecting to existing enterprise gdbs works fine in ArcPro also adding a feature dataset and data.