Can anyone help me fix a problem with static meshes.

HELP! I am a composer working on a showcase project for my music however my project in unreal seems to have weird looking black lines and triangles all over it (See attached pictures) I have asked different people and tried multiple times to fix this over the last week but Iā€™m stumped. The project is due in tomorrow and I really need someone with the brains to fix this for me quickly! Cheers :slight_smile: