I'm installing the vBulletin software, and early in the process I'm getting this error:
Due to the following errors, the install/upgrade can not continue:
Error description: 2: mysqli_real_connect(): (HY000/1045): Access denied for user '[myusername]'@'localhost' (using password: YES)
The database has failed to connect because you do not have permission to connect to the server. Please confirm the values entered in the core/includes/config.php file
But the information in the config.php file is absolutely correct. No extra white space, triple checked spelling and password, etc. I can see no reason why it wouldn't work. UNLESS.... there's something else in the config file that doesn't play well with the server? It's pretty straightforward stuff, but who knows...