The PDF attachment on the notification did not contain any data.

In addition, before the problem of the not sending notifications was, I received the notification andthe pdf-attachement, the received email cotained the entered data, but the pdf-attachement didn't include any data, there was just an empty pdf-form. What could the problem be?

I cloned your form and did a test submission, but I was not able to encounter the issue you are reporting. The submitted data was displayed in the attached PDF.

 

Are you still encountering the issue? Does this happen on a certain submission or all of your submission? Can you test it again and see if it is working now? If the issue still persists, can you provide us a screenshot of the PDF you received so we can further analyze the issue? To add a screenshot to this thread, just follow the instructions provided in this article: How to add screenshots images to questions to the support forum.

 

Will wait for your response.
Regards.