Won't change to a new skin, app crashes when world saves, sky glitches at night, game lags alot...

When changing to a new skin, it either stays the same as the previous skin or turns black or into weird collages of pictures...

 

When I want to save my world it starts glitching like crazy and won't proceed to the menu... I always have to restart the game...

 

At night in the game, the sky usually starts turning a bright green or rayes of different colors... It's affecting my game... 

 

When playing the game, mostly when running  the game starts lagging like crazy.... 

 

I'd love it if you guys could fix all those problems... Please 🙏