Seahub failure in server startup? (Error happened during creating seafile admin.)

Out of the blue today, apparently after having restarted my server, I found out that the libraries are not loading on my Seafile client. My Seafile server is 6.2.3. I keep getting the error on the GUI:

“Failed to get libraries information. Please retry”.

On seafile.log, I see this error message a lot:

http-tx-mgr.c(1236): Bad response code for GET 503.

Now I can see that “” is not accessible.

I followed to Seahub, and found that on startup, it gives this error in seahub.init.log:

“Error happened during creating seafile admin.”

And I’d like to point out that the Apache http_proxy and rewrite extensions are installed.

I’d like to point out that this Seafile installation was problematic and gave some Sqlite errors that I had to fix manually. I don’t know if this is related. There was problems about duplicated columns. After having fixed it, it was alright. I’m not sure whether this is the cause again.

The web interface is working, but after I login, it gives an error “Service not available”.

Please advise. I don’t know how to approach the problem.