Unable to create code pipeline host

I am trying to create a host on code pipeline. I am getting "Vpc configuration initialization failed" error.

I can access GitHub Enterprise instance through an ec2 instance that is on the same subnet with host's vpc configuration. Also that ec2 instance has same security group with host's vpc configuration.

When I look at the throubleshooting documentation Document in the "I’m unable to get a host in pending state" there is a check list and I believe my configuration is covers all of them.

Can I see more detailed error log and if I can where I can see it? cause now I don't know if its a permission or connection error. Thanks.