Likely causes of admin server error?

[Ian W. Scott]

What are the "likely culprits" I should be looking at when I get an "Internal server error" accessing admin or appadmin on a fresh web2py installation? Here's what I've been trying so far. 

- Apache2 config file correctly configured?

    - Am I blocking access to admin?

    - Is https access configured?

- accessing over https?

- admin password set?

- parameters_443.py file present in web2py folder and accessible?

I've confirmed that all of these are working properly. (The apache2 config is identical to one working fine on an identical server.) 

So what else could be blocking admin? What else should I be looking at?

Thanks ahead of time 

- newest web2py source, py3.7, apache 2.4 with mod_wsgi

[Tim Nyborg]

I'd look at the apache logs.  I ran into the same problem with an nginx/uwsgi config, and uwsgi's logs pointed me to the fact that I had the wrong group on the application's file permissions.