Adobe Acrobat APP for iPad not communicating with Adobe Sign APP

While customer facing we use adobe acrobat APP for IPAD to create our contracts and adobe sign APP for IPAD to have them signed. As of last week the APPs have stopped consitently communicating. We have been using the apps for the last few years without issue so something has changed. We have deleted all apps reinstalled. signed out and signed in and updated the ipads IOS and apps. nothing has resolved the issue. We are able to fill in the document in acrobat, and then send a copy to sign, hower when sign is attempting to render/build the contract it fails and notes " unable to send document, Opereation Failed"