If you receive this error when using the PDF Manipulator DC plug-in, you will need to install the Acrobat plug-in. Please follow these steps:

1) Close Acrobat and FileMaker
2) In Finder, navigate to Go > Go To Folder... and type in "~Library/Application Support/Adobe/Acrobat/DC/Plug-ins
3) Copy and Paste the Acrobat plug-in “PDFManipulatorDCAcrobatPlugin.acroplugin” (which can be found in the “Extras” folder in the Installer) into the Plug-ins folder

There's also another location that the plug-in can be stored, so if the above still does not work, please try the following:

1) Close Acrobat and FileMaker
2) Navigate to Applications > Adobe Acrobat DC, right click on Adobe Acrobat and select “Show Package Contents”
3) A new Window will pop up and and navigate to Contents > Plug-ins
4) Copy and Paste the Acrobat plug-in “PDFManipulatorDCAcrobatPlugin.acroplugin” (which can be found in the “Extras” folder in the Installer) into the Contents > Plug-ins from step 3 above