https://dtyprojects.42web.io/forum/
General Error
SQL ERROR [ mysqli ]
Access denied for user ‘‘@’’ (using password: YES) [1045]
An sql error occurred while fetching this page. Please contact an administrator if this problem persists.
Hello,
How come I can’t access my phpbb forum anymore?
Here is your answer
Please read
I don’t understand, I didn’t change anything…
Last time I went it worked.
When I try to connect to phpmyadmin through the infinity dashboard, I don’t get access.
It directs me to this link: https://php-myadmin.net/login.php
It changes nothing…
There’s one thing that has changed, it’s not normal that I can’t access my tables in phpmyadmin. 
I think I’ve lost hours of work.
“It” changes nothing. That guide isn’t “it”. The guide contains many solutions so I don’t know what is the “it” that you had tried.
Specifically, did you try this?
It seems you reset your hosting account password already, because phpMyAdmin is working for your account. However, your website is not.
After changing the account password, did you also update the database password in the configuration file of your website? Because if the password is incorrect, you’ll also get the “Access denied for user” error.
After all that maneuvering, it worked.
But I wonder what all the fuss is about… 
Thanks a lot