"Acme Demo Setup" plugin is installed on a WordPress instance (Domains > example.com > wp_instance_name > Plugins button).
WordPress admin page of the instance in Plesk http://example.com/wp-admin fails while opening with the following error:
CONFIG_TEXT: example.com is currently unable to handle this request.
HTTP ERROR 500
/var/www/vhosts/example.com/logs/error_logthe following error can be found :
CONFIG_TEXT: [proxy_fcgi:error] [pid 16330] [client 203.0.113.2:46016] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function plugin_dir_url() in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/acme-demo-setup/acme-demo-setup.php:20\n
The "Acme Demo Setup" WordPress plugin requires more memory or time to execute.
Go to Domains > example.com > PHP Settings;
Set values for the following parameters:
Note: If does not help set the values from this plugin developer's article.
If nothing of the mentioned helps, contact plugin developers for further assistance at https://www.acmethemes.com/supports/
As temporary workaround disable the plugin
Acme Demo Setup at Domains > example.com > wp_instance_name > Plugins button.