Crash When try to chamge settings

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Steps To Reproduce

1. Open Einstellungen
2. press on Anfangszeit or Endzeit

Expected behavior: Posibility to change time

Actual behavior: Red moon dies

Additional description/details (optional) Add any other context about the problem here.

Device info:

• Red Moon version (under Red Moon settings): v4.0.0
• Android version (under Settings > About device): 6.0.1
• Device: SM-A300FU