1. Ваш никнейм, сервер: на форуме аккаунт этот, сервера нет по причине проблем
2. Интересующий вас вопрос: я скачал .jar лаунчер, пробую запустить, пишет такое:

Exception in thread "main" java.lang.InternalError: java.lang.NoSuchFieldException: no such field: java.lang.ClassLoader.usr_paths/[Ljava.lang.String;/putStatic

at launcher.jljiiiJjLIiIIljJjIJIjliLIjiLJJli.<clinit>(SourceFile:196)

at launcher.JjJiIJljIIJjilLLiIjJJiLJlILLlLlj.isValidCertificates(SourceFile:127)

at launcher.JjJiIJljIIJjilLLiIjJJiLJlILLlLlj.verifyCertificates(SourceFile:375)

at launcher.jjLILjiJlJiLLLLLjJJJiLljLLlljLIl.main(SourceFile:254)

Caused by: java.lang.NoSuchFieldException: no such field: java.lang.ClassLoader.usr_paths/[Ljava.lang.String;/putStatic

at java.base/java.lang.invoke.MemberName.makeAccessException(MemberName.java:917)

at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:994)

at java.base/java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:3742)

at java.base/java.lang.invoke.MethodHandles$Lookup.findStaticSetter(MethodHandles.java:3267)

at launcher.jljiiiJjLIiIIljJjIJIjliLIjiLJJli.<clinit>(SourceFile:183)

... 3 more

Caused by: java.lang.NoSuchFieldError: Class java.lang.ClassLoader does not have member field 'java.lang.String[] usr_paths'

at java.base/java.lang.invoke.MethodHandleNatives.resolve(Native Method)

at java.base/java.lang.invoke.MemberName$Factory.resolve(MemberName.java:962)

at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:991)

Запускаю с помощью java 21.0.5, jre есть, пробовал сносить и ставить джаву, ни-че-го