hello so i was playing this mod pack and i added some mods and it still worked fine but all of the sudden it stopped working and kept crashing and i dont know what to do can someone help?

here is the game out put

 

 

 

 

00:23:54.696

[java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.defineClass1(Native Method)

00:23:54.696

[java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.defineClass(ClassLoader.java:760)

00:23:54.697

[java.lang.Throwable:printStackTrace:643]: at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

00:23:54.697

[java.lang.Throwable:printStackTrace:643]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)

00:23:54.697

[java.lang.Throwable:printStackTrace:643]: ... 6 more

00:23:54.697

[java.lang.Throwable:printStackTrace:667]: Caused by: java.lang.ClassNotFoundException: net.ilexiconn.llibrary.server.asm.RuntimePatcher

00:23:54.705

[java.lang.Throwable:printStackTrace:667]: at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)

00:23:54.706

[java.lang.Throwable:printStackTrace:667]: at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

00:23:54.706

[java.lang.Throwable:printStackTrace:667]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

00:23:54.706

[java.lang.Throwable:printStackTrace:667]: ... 10 more

00:23:54.808

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0

00:23:54.808

Process crashed with exit code 1

if someone can help that would be amazing. because my sis and i like to play minecraft and i want to play it but i keeps doing this so someone please respond

1.12.2 is no longer supported,

update to a modern Version to receive support.