Blank screen when Credit Card payment is submitted through Authorize.net

We are using a authorize.net in our registration form and when clients process the form with a credit card payment they see a blank screen, the payment is not processed and the from is not submitted. 

This form has been active for a few days without any issues and then the above problem began.

Please advise on how to correct this error.

We apologize for the inconveniences caused. I cleared your form cache here. Could you please try it again?

I tried a test card in your form and the authorize.net payment seem to be working since it was declined my test card.

I also cloned your form here and tested it on sandbox mode and it's working as expected. I can see the thank you page after submitting the form. Example:

My cloned form: https://www.jotform.com/200647122924955

Thank you for your help. I did a test submission and it seems to be working.  is there something that might have caused this problem?  What should I do if it occurs again?

Based on my colleague's previous answer, he cleared your form cache, which you can also do so by following this guide:

How-to-Clear-Your-Form-Cache