JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I just tried our Stripe Integration and failed to replicate the issue you're reporting. I managed to login to Stripe within JotForm successfully. Here's how it looked like from my perspective:
Can you give it another try? I would recommend you try loading our Form Builder on Chrome just in case you're using a different browser. It would also help us if you can tell us any error message you see when trying to login (e.g. if the error says anything about your Stripe username/password, then it means you're probably entering incorrect credentials).
Screenshots would help too, you can attach an image to this thread (not in your email) by following this guide on How-to-add-screenshots-images-to-questions-in-support-forum
If you're still having issues, just reply to this thread then give us more info so we can better assist you.