Form not found error - urgent problem

Dear Jotform,

When people try to make reservations for my master's performance - the form "Dinsdag 30 mei" for the option "17u15", they get the error message:

I have repeated the action myself and I get the same error message. Also from different devices.
Even though the form still clearly exists.
I need to fix this asap. Any tips and fixes are welcome.
Please advise!

Kind regards,

Fien

Everything should be fully functional once again.  Let us know if you have any further trouble with forms and we will be happy to have a look.

Dear David,

Thank you so much for your quick reply!

However, the issue has not been resolved.
I keep getting this error message when submitting a response to the form.
Both on my laptop and mobile device.

Please advise.

Kind regards,

Fien

I tested one of your forms and the submission just went through.  As far as I can tell, your forms should be working at this time.

I cleared your forms cache in case if was a caching issue.  Let us know if you still cannot submit forms and we will look into this further.

Ah, after I received your test submission, everything started working again perfectly!

Thanks so much for clearing this up so quickly.
I can't begin to tell you how much that means :) 
I'm getting reservations again for my performance!

Thank you, David!
You're a true modern-digital-hero. 
I sincerely mean that.

Warm regards,

Fien