When I work on with form fields, after new hours of adding / editing form fields, almost all the time, the document gets corrupted. I cannot add new field / edit field names. Previously Adobe Acrobat DC used to crash.
I am using the latest. Mac is all to date. Enough free ram, etc.
Attached the working doc, I am not able to add new field or edit field name
The properties of the file say it was created using Preview, which is extremely buggy and corrupts PDF forms just by opening them. Do not create your files in this application, and don't even open them in it. If you do, they will become corrupt.