Critical Error</h1><p>Could not connect to the database.

[Nimesh Piyumal]

I tried hard to solve this but I couldn't solve it.

 

 

[wtools]

Hello,

It’s clear that there is an issue with your database configuration. First, try connecting to the MySQL database using the credentials provided in your configuration.php file and check whether the connection is successful.

[Nimesh Piyumal]

Even when WHMCS is working fine, that same error appears.

[DennisHermannsen]

I remember we had the same issue when using /opt/cpanel/ea-php81/root/usr/bin/php. It wouldn't work on one WHMCS installation but would work on others.
We changed it to /usr/local/bin/ea-php81 and it started working.

[bear]

For the record, posting your entire server path to the cron file (or any internal files, for that matter) should be avoided.

[RadWebHosting]

You may also want to check with WHMCS, since your license isn't active: https://www.whmcs.com/members/verifydomain.php/verifydomain.php

[WHMCS Alex]

Hi,

I would advise checking the required extenstions/modules are present, e.g:

php -m

We would expect to see:

PDO
pdo_mysql

You may also find this documentation helpful: https://docs.whmcs.com/8-13/troubleshooting/troubleshoot-the-database/could-not-connect-errors/