The following error can be found in /var/www/vhosts/example.com/logs/error_log
[access_compat:error] [pid 13317:tid 140073563543296] [client 203.0.113.2:51234] AH01797: client denied by server configuration: /var/www/vhosts/example.com/httpdocs/
Cause:
Apache 2.4 is installed, but the file .htaccess contains authorization and authentication entries with syntax from the 2.2 version.
Resolution:
In Plesk Interface:
1. Log into Plesk.
2. Go to Domains > example.com > File Manager and click on the name of the file .htaccess.
3. Replace the directives as follows:
Before:
Order allow,deny
Allow from all
After:
Require all granted
Click OK or Apply to save the changes.
OR
In CLI:
1. Connect to the server using SSH.
2. Open the file /var/www/vhosts/example.com/httpdocs/.htaccess for editing.
Change the following entries:
Order allow,deny
Allow from all
to
Require all granted