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Please let us know the form with which you are having this issue with. The issue seems to be that you are using a field with email validation. I did check your last edited form "Ücretsiz 2015 Niyet Çalışması" and did not find any field where you are asking for city of living. Rest all your forms are old forms and last edited in April of this year.
If you are getting the validation error, you can change the "Validation" of that field to "none" and that should solve your problem. Please check the screenshot below:
But do get back and let us know the form you are having this issue with and we will take a look.
We will wait for your response.