MC Version: 1.21.10 and 1.21.9 (both tested) Mod Loader: fabric Loader Version: 0.17.3 When stopping the server, an error occurs: java.lang.NoClassDefFoundError: net ...

I am getting the above exception when trying to open an activity which hosts a fragment that provides a menu. The application project references a library project and ActionBarSherlock (as a library ...