Crashing when trying to play

I downloaded InfiTech 2u Fear the Night and when i click play, it opens up the minecraft launcher perfectly fine. Only when i click play on the minecraft launcher does it load halfway and give me a “your game has crashed” error. i was wondering what is wrong, and how i can fix it.

EDIT: I got the modpack by downloading the ZIP file from the website and adding it as a custom profile by importing it. When i tried to download it on the launcher, it would just say “Installing” for 10 minutes, then say deleting temp zip and say it had failed to download

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