Adobe Acrobat Pro DC 2019.021.20056
I know for us encountering the error, it was being caused by a 3rd-party add-in. As soon as we removed it from that folder, the issue ceased. If you were to follow @Narciso279086791h9i 's advice, you would be wiping out all 3rd party add-ins. When the folder gets recreated, those 3rd party files don't come back. A more intentional method you could use is the one that @CapitaineSaucisse outlined in his post here: -reader-discussions/invalid-plugin-detected-adobe-acrobat-read...
Adobe Acrobat Pro DC 2019.021.20056
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