@tkama, @uscore713, @unwirklich, @kristofluyten,
The issue here is likely a conflict with W3TC. I had the same issue when trying to use the plugin. I tracked it down to a legacy call to w3_instance on or around line 172 of the file class.DemInit.php
.
This line:
if( defined('W3TC') && @w3_instance('W3_ModuleStatus')->is_enabled('pgcache') ) return true;
changed to:
if( defined('W3TC') && W3TC\Dispatcher::component( 'ModuleStatus' )->is_enabled('pgcache') ) return true;
made the plugin work for me.
@uscore713
Nice call on the caching plugins, but for me the option you mentioned didn’t show until after the fix. The plugin errored out before the setting even displayed to the screen, leaving only the first checkbox and not even a label. So Likely anyone else having this problem couldn’t be helped by your well-reasoned answer.