I want to move an EE 4.3.5 website from a development server to a production server. In this purpose, I have applied the steps presented here in the EE documentation.
But, when I want to access the Control Panel on the production server, the browser displays a Disallowed Key Characters error.
I have applied the the first answer to this post to have more info about the error. At line 997 of system/ee/legacy/core/input.php, I have added the $str variable into the $error variable.
Now, the browser shows : Disallowed Key Characters exp_last_visit
It appears that the error comes frome the exp_last_visit value, which seems to be a cookie.
How to fix this ?