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Are you referring to this form - https://www.jotform.ca/form/51777411205249? I did a test submission in your form but I was not able to encounter any error. I was redirected to the paypal payment when I submit your form.
Are you still encountering this error? Can you try again and test if it is working now? If the issue still persists, can you provide us more details regarding the issue so we can further check?
We will wait for your response.