Don't understand where is problem....

Question

https://code.sololearn.com/WH0yRu3SYqMD/?ref=app

Answer 1

There is a smaller button to the right of the submit button, a click on this button raises the error. if the button has no purpose just remove it.

Answer 2

where is the problem...* :)

Answer 3

I don't use JS but in my experience you should remove extrainous features that have no use, the error is often that extrainous feature. Try removing that button and the function it points to. :/