Hi Tiffany,
We are currently investigating this issue. In order to help us with that, can you please tell us your method account name? Also can you tell us what email server are you using (for example GMail, Exchange, etc.)? Also, if you try submitting data through your own webform, are you getting any errors displayed to you in the browser? When you have submitted data to yourself, no data went through to method, correct? Also, are you submitting data from http or https page? When did you start experiencing this error? Were there any changes website where your web form is hosted which could have possibly caused this error? Does loading the web form in web form editor and then saving it again help?
Your help is greatly apperciated,
Thank you
Victor