Hallo, i have the same issue (with all plugins deactivated, wordpress version 5.52, apache 2.4). I have edited the htaccess file in my wp-admnin folder like i have read here but it does not solve my problem. I have added the following:
Require all denied
Require ip xxx.xxx.xxx.xxx
Require local
Where has this htaccess file to be? In the wp-admin folder? In the plugins folder?
What can i do else?