Windows 11 Adobe Acrobat Pro Sign button does nothing.

Just updated my OS to Windows 11. 

Signed into creative cloud account and installed Adobe Acrobat Pro.

I need to sign a document. On windows 10 I had 2 signatures set up which used PNG images with transparent backgrounds featuring my signature and company stamp. This has worked very well. 

When I try to use the sign button, nothing happens. 

I have uninstalled and reinstalled acrobat. 

I have tried repairing acrobat and restarting my machine. 

I have added my identity details ensuring that the email address matches my CC account email address. 

I have manually added signatures via Preferences/Signatures/Creation and Appearance Preferences.

Despite the above, I cannot figure out how to add my signature to a document. 

System info: Windows 11 Home, Version 21H2, OS Build 22000.1165