java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.serpentcs.saltracker.core.orm.provider.BaseModelProvider.setMatcher(BaseModelProvider.java:86)
at com.serpentcs.saltracker.core.orm.provider.BaseModelProvider.query(BaseModelProvider.java:93)
at android.content.ContentProvider.query(ContentProvider.java:922)
at android.content.ContentProvider$Transport.query(ContentProvider.java:213)
at android.content.ContentResolver.query(ContentResolver.java:462)
at android.content.ContentResolver.query(ContentResolver.java:405)
at com.serpentcs.saltracker.core.orm.OModel.select(OModel.java:648)
at com.serpentcs.saltracker.core.orm.OModel.select(OModel.java:636)
at com.serpentcs.saltracker.addons.employees.fragments.TeacherAttFragment.setupAbsentReason(TeacherAttFragment.java:459)
at com.serpentcs.saltracker.addons.employees.fragments.TeacherAttFragment.onActivityCreated(TeacherAttFragment.java:187)
at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:2089)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1133)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1677)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5299)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829)

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