receive no emails

Hello, after I bought and validated the license for the Chronoform, I will no longer receive emails. Can you please check it out, because it worked before validation.
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if you will i give you a login... to https://www.manuelmarburger.de/terminvereinbarung.html
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regards

Post a debug.

hi, debugger is on but i get no error message... in the form i have added a debugger... but after sending there is no message anywhere...
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is there any way that anybody can take a look at the settings?
https://www.manuelmarburger.de/terminvereinbarung.html