If you have too many mods for Gacha club it might not work and also if you have the actual game Gacha club that might be the problem because I had the same problem and all I had to do is delete Gacha club but you might have to check your storage first to see how much storage you have and take screenshots of your character since the game does not save any data once deleted and when it doesn't work download Gacha club again and recreate your character as you try to find another way to download Gacha neon.