Maybe you can't even run your migrations or bundle install neither run your test because you have an ENV var that relies on your project or gem where you are using
ENV.fetch and you are seeing a key error because your project can't identify that ENV var.
Add your ENV VAR
This will happen automatically when you close your terminal but like when you are doing changes to your setup, maybe the changes aren't being reflected.
This should be all.
See you in the next post.