Adobe Acrobat crashes after selecting Request E-signatures

A client of mine is dealing with a persistent crashing issue in Adobe Acrobat when selecting Request E-signatures. The first time it happened, Adobe gave a pop up about some new feature/experience. She had selected it and it changed how everything was viewed. From that point, Acrobat would crash every time after selecting Request E-signature. The Send Report pop up would show up but the log didn't really show anything. We got to the point where we did the full nuke on Adobe CC. We uninstalled everything and ran the Adobe CC Cleaner. We did a fresh install and made sure CC, Acrobat, and the Windows system was up to date. At first, we got the error message that you'll see in the attached screenshot. "The exception unknown software exception (0xc0000028) occurred in the application at location 0x00007FFA980FF77D." message came up. We made one change and deselected "Use modern user interface for signing and Digital ID configuration" in Preferences>Signatures. I'm pulling my hair out regarding this. I figured doing the whole nuke option would resolve it but it continues to crash. Any help would be greatly appreciated. Thanks!