I cant install modpacks pls help :c

[TunaS]

i cant install modpacks ERROR CODE--->      [B#546] java.lang.NoClassDefFoundError: org/eclipse/aether/impl/DefaultServiceLocator$ErrorHandler
[B#546]     at net.technicpack.minecraftcore.install.tasks.HandleVersionFileTask.<init>(HandleVersionFileTask.java:60)
[B#546]     at net.technicpack.launcher.launch.Installer.buildTasksQueue(Installer.java:282)
[B#546]     at net.technicpack.launcher.launch.Installer$1.run(Installer.java:114)
[B#546]     at java.lang.Thread.run(Unknown Source)
[B#546] Caused by: java.lang.ClassNotFoundException: org.eclipse.aether.impl.DefaultServiceLocator$ErrorHandler
[B#546]     at java.net.URLClassLoader.findClass(Unknown Source)
[B#546]     at com.regexlab.j2e.Jar2ExeClassLoader.findClass(Unknown Source)
[B#546]     at java.lang.ClassLoader.loadClass(Unknown Source)
[B#546]     at java.lang.ClassLoader.loadClass(Unknown Source)
[B#546]     ... 4 more
[B#546] Unhandled Exception in Thread[Thread-51,6,main]

Edited June 4, 2020 by TunaS
my eyes

[Lord Ptolemy]

Cracked launcher. Locked.