[SOLVED] Error connecting to the database after updating prestashop

[VMCreativo]

Hello I leave this here in case someone might find it useful after spending several hours trying to fix it.

Upgrading prestashop from version 1.7.5 to 1.7.6.1
Hosting: CPanel with CentOS and PHP 7.3
Correct update without faults.

When I update the browser:
Error 500 in backoffice and frontoffice.

With the following error:

Link to database cannot be established: SQLSTATE[HY000] [1045] Access denied for user 'myuser'@'localhost' (using password: YES) at line 127 in file classes/db/DbPDO.php

Obviously the password is correct.

Try reinstalling Prestashop manually.
Try clearing the cache (cd myshop; rm var/cache/* -Rf)
Try deactivating modules
Try deactivating template

Nothing works

My password is C34%}D4B2)GdDB^H6xo}

Try changing the password in MySQL to a simpler one with only numbers and letters.

I clear the cache... and it works correctly.

There is some problem with parsing this type of passwords in the latest version.

I would open a bug but I don't have time, I post this in case someone can save hours of frustration and wasted time.

Good luck!