i tried loading 1.20.1 profile it says this
[info] Skipping inactive library org.lwjgl:lwjgl-tinyfd:3.3.1:natives-macos-arm64 [info] Skipping inactive library org.lwjgl:lwjgl-tinyfd:3.3.1:natives-windows [info] Skipping inactive library org.lwjgl:lwjgl-tinyfd:3.3.1:natives-windows-arm64 [info] Skipping inactive library org.lwjgl:lwjgl-tinyfd:3.3.1:natives-windows-x86 [info] Found library org.lwjgl:lwjgl:3.3.1 at file:/home/ap/.minecraft/libraries/org/lwjgl/lwjgl/3.3.1/lwjgl-3.3.1.jar [warning] Skipping missing library org.lwjgl:lwjgl:3.3.1:natives-linux [info] Skipping inactive library org.lwjgl:lwjgl:3.3.1:natives-macos [info] Skipping inactive library org.lwjgl:lwjgl:3.3.1:natives-macos-arm64 [info] Skipping inactive library org.lwjgl:lwjgl:3.3.1:natives-windows [info] Skipping inactive library org.lwjgl:lwjgl:3.3.1:natives-windows-arm64 [info] Skipping inactive library org.lwjgl:lwjgl:3.3.1:natives-windows-x86 [info] Found library org.slf4j:slf4j-api:2.0.1 at file:/home/ap/.minecraft/libraries/org/slf4j/slf4j-api/2.0.1/slf4j-api-2.0.1.jar [info] Finished loading libraries. [crash] Amidst has encounted an uncaught exception on the thread Thread[WorkerExecutor-6,1,main] [crash] java.lang.UnsupportedClassVersionError: net/minecraft/server/MinecraftServer has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0 at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:555) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at amidst.mojangapi.minecraftinterface.RecognisedVersion.getMainClassFields(RecognisedVersion.java:269) at amidst.mojangapi.minecraftinterface.RecognisedVersion.generateMagicString(RecognisedVersion.java:260) at amidst.mojangapi.minecraftinterface.RecognisedVersion.from(RecognisedVersion.java:255) at amidst.mojangapi.minecraftinterface.MinecraftInterfaces.fromLocalProfile(MinecraftInterfaces.java:33) at amidst.mojangapi.RunningLauncherProfile.from(RunningLauncherProfile.java:26) at amidst.mojangapi.LauncherProfileRunner.run(LauncherProfileRunner.java:22) at amidst.gui.profileselect.LocalProfileComponent.tryLoad(LocalProfileComponent.java:142) at amidst.threading.WorkerExecutor.lambda$run$9(WorkerExecutor.java:71) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829)
Amidst is dead. Hasn't been updated in years.