Adobe Acrobat 9 Pro not allowing to be reader enabled
I had created an invoice form in Adobe Acrobat 9 with minor coding a while back, which has been used by another person for years with Reader 8, both older Windows computers (creator is XP and user is Vista). Never had any problems. Suddenly on 1/9/23, the user with Reader 8 can't fill in or use the form at all, and gets this message:
"This document contained certain rights to enable special features in adobe reader. The document has been changed since it was created and these right are no longer valid. Please contact the author for the original version of this document."
I am the author and didn't make any recent changes. Any minor changes in the past were never an issue. Now, I can't even extend features when I try to resave to solve this, I get "This document cound not be Reader Enabled".
What is going on? This is extremely annoying, like some expiration date stopped everything. Thanks for any help to solve this.
