I have a modpack and try to add enhancedvisual mod but when i run the game it wil show error unsupportedoperation

Even i just only run with 2 mod is enhancedvisual and creativecore it have the same error

Crash file:
crash-2025-08-13_12.14.44-fml.txt
Log file:
latest.log

The version for 1.21.4 is not supported anymore. I'm currently trying to update to 1.21.8, but it will take some more time.