Hello admin,
I am trying to upgrade QB on the higher version.
I also try to merge personal changes on the new version.

But I encountered an error:

QB12\com.pmease.quickbuild\src\net\sf\cglib\proxy\Enhancer.java:485: error: cannot find symbol
[javac]     protected Class generate(ClassLoaderData data) {
[javac]                              ^
[javac]   symbol:   class ClassLoaderData
[javac]   location: class Enhancer
[javac] 1 error
[javac] 6 warnings

If you've ever encountered something similar, share the solution for me.