Проблема с декомпиляцией

Решил начать заниматься моддингом, делал всё по тутору, чтобы сделать рабочую среду (1.5.2), вроде всё нормально, но при декомпиляции майнкрафта вылазит данная ошибка:

== MCP 7.51 (data: 7.51, client: 1.5.2, server: 1.5.2) ==​

> Searching for javac.exe in C:\Program Files
"scalac" is not found on the PATH. Scala files will not be recompiled
# found ff, ff patches, srgs, name csvs, doc csvs, param csvs, renumber csv, ast
yle, astyle config
> Creating Retroguard config files
!! Modified jar detected. Unpredictable results !!
!! client already decompiled. Run cleanup before decompiling again !!
!! Modified jar detected. Unpredictable results !!
== Decompiling server using fernflower ==
> Creating SRGs
> Applying Retroguard
'"C:\Program Files\Java\jdk-12.0.2\bin\java" -cp "runtime\bin\retroguard.jar;lib
;lib\*;jars\minecraft...' failed : 1

== ERRORS FOUND ==

Unrecoverable error during obfuscation, see log file for details.
RetroGuard error: COM.rl.obf.classfile.ClassFileException: ClassNotFound qv
COM.rl.obf.classfile.ClassFileException: ClassNotFound qv
at COM.rl.obf.Cl$ExtNameListUp.<init>(Cl.java:1540)
at COM.rl.obf.Cl.getExtNameListUp(Cl.java:1511)
at COM.rl.obf.Cl.resolveThis(Cl.java:903)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:853)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:846)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:839)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:839)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:846)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:846)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:839)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:839)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:839)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:846)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:846)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:839)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:865)
at COM.rl.obf.Cl.resolveNameSpaceExcept(Cl.java:846)
at COM.rl.obf.Cl.resolveOptimally(Cl.java:646)
at COM.rl.obf.ClassTree$6.classAction(ClassTree.java:687)
at COM.rl.obf.ClassTree.walkTree(ClassTree.java:1488)
at COM.rl.obf.ClassTree.walkTree(ClassTree.java:1480)
at COM.rl.obf.ClassTree.walkTree(ClassTree.java:1471)
at COM.rl.obf.ClassTree.walkTree(ClassTree.java:1471)
at COM.rl.obf.ClassTree.walkTree(ClassTree.java:1471)
at COM.rl.obf.ClassTree.walkTree(ClassTree.java:1452)
at COM.rl.obf.ClassTree.resolveClasses(ClassTree.java:682)
at COM.rl.obf.GuardDB.createMap(GuardDB.java:437)
at COM.rl.obf.GuardDB.remapTo(GuardDB.java:464)
at COM.rl.obf.RetroGuardImpl.run(RetroGuardImpl.java:182)
at COM.rl.obf.RetroGuardImpl.obfuscate(RetroGuardImpl.java:131)
at COM.rl.obf.RetroGuardImpl.obfuscate(RetroGuardImpl.java:113)
at RetroGuard.main(RetroGuard.java:90)
==================

Decompile failed
Для продолжения нажмите любую клавишу . . .

Жду, заранее спасибо!