I have a user who prepared some PDF signed forms on one computer, but when he views it on another computer, the form fields come up empty. Uninstalling and reinstaling Acrobat (version 2021.001.20145) made no difference. Trying a different user profile also made no difference.
I tried to edit the form on the problem computer and re-save it. That triggers the following
"The document could not be saved. There was a problem reading this document (105).
Clearly something is amiss on this particular computer and its edition of Acrobat.