When trying to add an image in Acrobat, I get a "Warnings and Errors: Unknown Error" popup

When trying to add an image in Acrobat, I get a "Warnings and Errors: Unknown Error" popup, and cannot add or replace an existing image in a pdf. . I have re-installed 3 times and each time it fixes it (briefly). This is happening every day, and occurs if I 'disable new Acrobat' so the old layout has the same issue. What is the PERMANENT fix? It stinks to re-install just to add an image. Thanks!