Minecraft PE crashes when opening

Minecraft doesn't open hence it crashes. At the first time i opened minecraft, it crashes, so i restarted my phone and when i opened it again it still crashes. I tried removing the resource packs folder for custom texture packs and then i restarted my phone again. When i opened minecraft it now works. When i placed the resource packs folder again, minecraft crashes again. Does this mean you prevent us now to use custom texture packs, or is this a bug? Please fix it. My phone is Grand Prime. Im pretty sure some phones have this problem too.