BUG! exception in phase 'semantic analysis' in source unit 'C:\Users\gtg07\Desktop\Flutter projects\ratesavvy\lib\flutter\packages\flutter_tools\gradle\src\main\groovy\app_plugin_loader.groovy' Unsupported class file major version 64 how to resolve this error

Probably downgrade your Java version to something < 20 (maybe 17?) or upgrade your tools to support Java 20

thank you