Error I take you can't install Bulletin here ?...

The database has failed to connect because you do not have permission to connect to the server. Please confirm the values entered in the includes/config.php file
Error description: mysqli_real_connect(): (HY000/1045): Access denied for user ‘epiz_22172029’@‘192.168.0.63’ (using password: YES) /home/vol2_6/epizy.com/epiz_22172029/htdocs/forum/includes/class_core.php on line 1351

Verify the permission tables (reloading grants if required) on the server and that you’re connecting to the correct server.

And also vbulletin might be running on innoDB which is not allowed on free hosting.
But idk if it is really running on innoDB

CMIIW, but there’s a local connection references right here:

‘epiz_22172xxx’@‘192.168.0.63’

Also, you might want to edit (censor) your username credential, just in case.

https://infinityfree.net/support/common-mysql-errors/