Fill & Sign stuck on loading squares

We are using Adobe Acrobat Standard 2017, the signature function worked fine about a week ago and it is no longer loading the signatures. I have tried reinstalling Adobe, checking for updates, editting the registry files, disabling protected view and enhanced security.
If I disconnect my Internet and try the signature function, it works, the result reoccurs if I reconnect. Adobe Acrobat DC works fine with no issues, but we have a license for the 2017 version that allows us to use it with no restrictions. I have tried it on my home Wi-Fi, company ethernet, and phone hotspot with no difference. I checked our firewall logs as well and nothing is blocking any Adobe domains.
