I am receiving a "Client denied by server configuration" error.

[Patato]

I am getting the error in the topic title from the error_logs file in the FTP directory. The only way to fix this is that some automatically generated commands in the .htaccess file are causing it, either created spontaneously or by a plugin. The issue is that I am using shared Linux WordPress hosting, which restricts some commands. This plugin keeps trying the restricted commands and logs the error when it encounters one. I am requesting help from those who are knowledgeable on this topic. The instructions between "BEGIN FRedirect_ErrorDocument" and "END FRedirect_ErrorDocument" lines are dynamically generated and should only be edited with WordPress filters. Changes made between these markers will be overwritten. The following codes are automatically added to the .htaccess file. I delete them, but they reappear on their own, causing the following errors in the error_logs:

[Tue Nov 30 13:57:31 2021] [error] [client 31.142.183.200] client denied by server configuration: /var/www/vhosts/tekstilbilgi.net/httpdocs/index.pl

[Tue Nov 30 14:00:30 2021] [error] [client 158.69.53.191] client denied by server configuration: /var/www/vhosts/tekstilbilgi.net/httpdocs/index.cgi

[Tue Nov 30 14:00:30 2021] [error] [client 158.69.53.191] client denied by server configuration: /var/www/vhosts/tekstilbilgi.net/httpdocs/index.pl

What should I do? Which setting in which plugin should I disable, please help. Thank you in advance. Site address is here.