IE 11 Compatibility Issue on Sign Up

Hello everyone,
I’ve been using this plugin for about two or three months now and everything has been working great up until recently. I’ve been using this plugin on an internal intranet. Users have recently reported problems whenever they try to sign up. They get the following errors whenever they hit submit to sign up and all the fields are populated and meet the creation criteria.

“Empty confirm password.”
“Required form field not found”
“Username is a required field”
“User Email is a required field”
“Password should not match with Username or Email address.”

The one thing all the problem users have in common is that they are trying to use IE 11. I tried it myself on IE 11 and sure enough, it doesn’t work! Because of our vendors, WE have to keep IE 11 around and it is unfortunately the de facto browser for a lot of people in my company.

Has anyone else run into an compatibility issues with the Sign Up form and IE 11?

Thanks!