Error submitting mod! Please verify your data and try again

So i have this issue “Error submitting mod! Please verify your data and try again.” how do i fix it? Because everytime when i try to upload a Scenario it gives me this error and i dont know how to fix it! Can anyone help me to fix this?

It looks like you finally got it uploaded. From what I can tell it somehow wasn’t registering your login correctly so was denying it since it didn’t know who you were. We have a to-do to have it return more informative error messages. If it happens again, try logging of the site and back on then try again.