PayPal error message when submitting form.

I have completed building my form I switch to preview mode to see how my PayPal link would work I enter the amount of $50 and click submit then I was directed to a PayPal page stating that things don't appear to be working at the moment please try again later I want to see if I'm getting this message just because I'm testing my phone I don't want to publish if this is the message that my users are going to receive when trying to submit their registration and payment please help

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