Error 500 when post form

Your software
My Mautic version is: 3.34
My PHP version is:7.33
My Database type and version is: mysql 5.7

Your problem
My problem is:
when submitting form for example from this external form in the buttom of this page הורדה מתרופות אנטי פסיכוטיות me and the user didn’t got any mail but new user is created
These errors are showing in the log:
in the web page console when submitt the form

Ju @ www-embed-player.js:1586
Gu @ www-embed-player.js:1583
Fu @ www-embed-player.js:1582
Ou @ www-embed-player.js:1591
(anonymous) @ www-embed-player.js:1807
(anonymous) @ qOsi-ygZEAk?controls=0&showinfo=0&rel=0:10 POST 500 (Internal Server Error)
libraries.js?v5d26bfaa:366 Uncaught DOMException: Blocked a frame with origin “” from accessing a cross-origin frame.
at HTMLDocument. (
at mightThrow (
at process (
Steps I have tried to fix the problem:
check permissions all the permissions in mautic that has to be writable is writable

i slove the problem by rebooting my server