The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters...

[carlitosdan]

Hello. I excute my App in local server and this work fine. but when I run this in web host windows server 2016 64bits, the app run one time and then I have this error:

The state information is invalid for this page and might be corrupted.

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

Thank you for hour help.