After some tough error research I've found the reason of a problem of mine I don't understand. I have a page with form controls that resides inside a nested masterpage. Whenever I try to run the form I run into this error:
The state information is invalid for this page and might be corrupted. [FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. ]
If I choose to run the form as a clean page without any reference to the masterpage it posts perfect.
I have tried the following solutions with no luck:
Do you guys have an explanation to why this error occurs and some advice on how to solve it?