Help with payment integration

My payment integration says 'verified' but form hangs on submit whether I'm in sandbox mode or live. Used to work fine. Even tried reintegrating payment. Please advise

I have tested your form and I was able to replicate mentioned issue. Preview Before Submit button is stuck on "Please wait" and submit button is not shown. 

Preview Before Submit widget is causing this issue. I have updated Preview Before Submit widget on your form and issue is now resolved. 

Please test your form again.

Let us know if you need further assistance.