Blank page when editing forms in the backend with RSForm! Pro

This is a known behavior caused by the Phoca PDF Content Plugin, which is actually a System Plugin. You can go to Extensions > Plugin Manager and disable it.

Another way of solving this is by opening /plugins/system/phocapdfcontent.php and locating the following lines:

 
    /*global $mainframe;
    if ($mainframe->isAdmin()) {
      return;
    }*/
 

Once you've located them, you can uncomment them (remove /* and */). From now on, the plugin should function properly without interfering with RSForm! Pro.

Note:

This behavior can also occur with the Phoca PDF - Webcatalog component. In this case the /plugins/system/phocapdfwebcatalog.php file would have to be modified as stated above.

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