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[ERROR] [FabricLoader/]: Uncaught exception in thread "main"

Caused by: java.lang.RuntimeException: Error invoking MC server bundler: java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a ...
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TestNG : Exception in thread "main" java.lang.NoSuchMethodError:

at org.testng.remote.RemoteTestNG.initAndRun (RemoteTestNG.java:137) at org.testng.remote.RemoteTestNG.main (RemoteTestNG.java:57) i searched through threads here and found out that i need to install ...