Crash, Twitter saknas (Unable to find explicit activity class {com.twitter.android/com.twitter.android.ProfileActivity})

[tommienu]

android.content.ActivityNotFoundException: Unable to find explicit activity class {com.twitter.android/com.twitter.android.ProfileActivity}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1541)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
at android.app.Activity.startActivityForResult(Activity.java:3351)
at android.app.Activity.startActivityForResult(Activity.java:3312)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:824)
at android.app.Activity.startActivity(Activity.java:3522)
at android.app.Activity.startActivity(Activity.java:3490)
at se.slashat.slashapp.fragments.about.AboutDetailFragment.openTwitterIntent(AboutDetailFragment.java:106)
at se.slashat.slashapp.fragments.about.AboutDetailFragment.access$200(AboutDetailFragment.java:20)
at se.slashat.slashapp.fragments.about.AboutDetailFragment$3.onClick(AboutDetailFragment.java:88)
at android.view.View.performClick(View.java:4147)
at android.view.View$PerformClick.run(View.java:17161)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:4787)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
at dalvik.system.NativeStart.main(Native Method)