Sys.Webforms.PageRequestManagerServerErrorException: ... status code returned from the server was: 0

I had tried almost everything in the world but it didn't solve the error. My issue was

1) Getting the error only in firefox
2) Getting it only on remote server not on localhost

I could only fix it by

Adding the below line of codes (just change the status code to what you were getting, I had status code error 0)






This code needs to be added in your designer page .. e.g



/*Add above code here*/