I'm getting the following error when trying to connect to my Observium page:
DB not connected, please check database connection configuration. DB Error 2002: No such file or directory

I found this post about it, but the fixes suggested here don't seem to work for me. 
https://www.turnkeylinux.org/forum/support/thu-20181129-0834/db-error-2002-no-such-file-or-directory-observium-turnkey

Has anyone else hit this problem and managed to fix it?