Joomla 4 instructions can be found in the Admin Tools for Joomla 4 documentation: https://www.akeeba.com/documentation/admin-tools-joomla/atwafissues.html. I am copying the relevant part of that page below.
Using FTP to regain access to your site's administrator
The failsafe way to regain access to your site's administrator backend is using an FTP application or your hosting control panel's File Manager to rename a file.
Go inside the plugins/system/admintools/services
directory. You will see a file named provider.php
. Rename it to provider-disable.php
. This will turn disable the Web Application Firewall from executing and you can access your site's back-end again.
After you have fixed the cause of your issue remember to rename provider-disable.php
back to provider.php
, otherwise your site will remain unprotected!
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!