Welcome, @prasadkvs20 and thank you for coming to the QuickBooks Community for assistance. I have some insight on the error message you are receiving to pass along.
This error will appear when there is either an outage in the system or a browser issue. Because you have received this error multiple times, it's most likely an issue with the browser.
Clearing cache should resolve this error message. You can find these and other steps here.
After you have completed these steps, if you are still receiving this error message please let me know.
I'll be keeping an eye out for your response, as I want to ensure this gets resolved for you so you can run payroll again.