How can I fix that error??

[DevAnDroidCoder]

java.lang.NoClassDefFoundError: Failed resolution of: Lorg/joni/Regex;
at org.eclipse.tm4e.core.internal.oniguruma.OnigRegExp.(OnigRegExp.java:54)
at io.github.rosemoe.sora.langs.textmate.TextMateAnalyzer.createFoldingExp(TextMateAnalyzer.java:103)
at io.github.rosemoe.sora.langs.textmate.TextMateAnalyzer.(TextMateAnalyzer.java:93)
at io.github.rosemoe.sora.langs.textmate.TextMateLanguage.(TextMateLanguage.java:44)
at io.github.rosemoe.sora.langs.textmate.TextMateLanguage.create(TextMateLanguage.java:51)
at com.ts.code.editor.editor.SoraEditor.SetUpSoraCodeEditor(SoraEditor.java:65)
at com.ts.code.editor.CodeEditorActivity$5$2.onClick(CodeEditorActivity.java:256)
at android.view.View.performClick(View.java:7184)
at android.view.View.performClickInternal(View.java:7157)
at android.view.View.access$3500(View.java:821)
at android.view.View$PerformClick.run(View.java:27660)
at android.os.Handler.handleCallback(Handler.java:914)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:225)
at android.app.ActivityThread.main(ActivityThread.java:7563)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:994)
Caused by: java.lang.ClassNotFoundException: org.joni.Regex
... 18 more