Re: Cannot select DB.
I changed the domain and path like you said. I do not know what the mysqli extension that you are talking about is, so I doubt I have installed it.
But, just in case, I followed your advice for replacing the mysqli.php file with the db.php file. In other words, I removed bb-includes/db-mysqli.php for safekeeping. I made a duplicate of bb-includes/db.php and renamed the duplicate bb-includes/db-mysqli.php.
However, I still get the error “Cannot select DB.”
Any other ideas?