In 90% of cases, this error is solved by either:
Several factors can contribute to the "RPCS3 Fatal Error: Verification Failed" issue: rpcs3 fatal error verification failed top
Confirm RPCS3 version
Switch from Precise to Approximate if you experience crashes during gameplay, though this may cause minor visual bugs in some titles. In 90% of cases, this error is solved
If the issue persists, the RPCS3 Support Wiki requires specific information for a valid bug report: In 90% of cases