Acrobat Reader DC opens PDF to a black screen
I have been opening and using a protected PDF for months for the CPIM self study program. Tonight I opened it and the PDF itself was all black with no text. If I scroll or click inside it I can briefly see the word "Joka" repeated over the entire document. I re-booted and tried again with the same results.
Anyone ever had this issue and can you offer advice to resolve?
