SCRIPT5007: Unable to get property 'split' of undefined or null reference error?

Questions
1

Im getting this error in microsoft EDGE when Im trying to submit a form, but I don´t know why?
I have tested the page in my laptop with the latest microsoft EDGE and there it is working as it should, but now when I test it at work on another computer with Microsoft Edge 44.17763.831.0 I get this error.
And it works in all other browser both on laptop and in phones.

SCRIPT5007: Unable to get property ‘split’ of undefined or null reference [framework7.bundle.min.js (13,139929)]

Any input really appreciated, thanks.

2

use console.log to share error

3

How do you mean? I get nothing to show in the console, Im not sure where the error is coming from? I don´t know what is undefined or null.