"View the phpinfo() page" button in Plesk does not work: Error: Unable to retrieve information about the PHP configuration

Symptoms

• Clicking the Domains> example.com > PHP Settings > View the phpinfo() page button results in the following error:

  PLESK_ERROR: Error: Unable to retrieve information about the PHP configuration.

• "FPM application served by Apache" or another Apache-based handler is selected at the Domains > example.com > PHP Settings page

Cause

Restrictive Apache rewrite rules are blocking access to the domain's phpinfo() page. For example:

CONFIG_TEXT: #<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} "!(^|/).well-known/([^./]+./?)+$" [NC]
RewriteCond %{SCRIPT_FILENAME} -d [OR]
RewriteCond %{SCRIPT_FILENAME} -f
RewriteRule "(^|/)." - [F]
</IfModule>
<IfModule mod_authz_core.c>
<FilesMatch "(^#.*#|.(bak|conf|dist|fla|in[ci]|log|orig|psd|sh|sql|sw[op])|~)$">
Require all denied
</FilesMatch>
</IfModule>

Resolution

Disable restrictive rewrite rules