Desktop Teams app not opening on Mac OS - High Sierra

Hello, hoping someone can help me ASAP. I have an interview tomorrow using Teams. 

I tried installing it on my MacBook Pro (then using Sierra). I received a Javascript error when opening after installation. I updated my OS to High Sierra, and still receive the same error. Please see screenshot attached. 

I've tried deleting Library files, reinstalling, etc. I'm out of options, please help! X