403 Forbidden Error on subdomain

So this issue had to do with File permissions. I believed that I had already checked into this to make sure that permissions were set properly, but I must have erred.

I went to the subdomain folder ‘staging’ which contains my WP install and turned on User ‘read’ and ‘write’ permissions, which were inactive. So now Web User and Owner permissions have been all set with read, write and execute permission.

Hope that helps someone!