When launching Final Cut Pro and certain FxPlug apps you may get a pop up window stating: An application would like to access data from other apps.
In order to prevent this pop up from appearing first press Allow. Close Final Cut Pro it if isn't already and then open your System Settings and navigate to the Privacy & Security tab. In Privacy & Security look for Full Disk Access.
Once you click into Full Disk Access you will be able to add applications to be trusted and prevent pop ups from appearing every time you launch Final Cut Pro or a specific plugin.
While in the Full Disk Access tab, press the + icon at the bottom of the panel as shown in the example and you will get a Finder window open for you to select applications to add to Full Disk Access. In the pop up navigate to the following path:
Macintosh HD > Applications > Pixel Film Studios > Plugins
In the Plugins folder you can select all applications as shown in the image below and then press the Open button at the bottom right of the window to allow access. You should see all applications toggled on in the Full Disk access for all added applications.
*We do recommend having Final Cut Pro itself also added here in the Full Disk Access as well.
After adding these applications to the Full Disk Access you will not get pop up windows every time you are launching Final Cut Pro.