Normally, the printer configuration works great on other days, but the Hp eprint printer validation failed error popsup when you need it the most. As a result, if there are any jobs in the queue that cannot be postponed, you may have a serious problem. Try these workarounds to see if they help you fix the problem.
1. Troubleshoot your printer using the Printer Troubleshooter.
2. For Windows, use HP Print and Scan Doctor.
3. Remove the driver and reinstall it.