Upgrading from v2 to v3 results in internal server errors I'm trying to upgrade a v2 site to v3 and have done the following:


Verified that my server meets the v3 requirements using the Craft Server Check.
Followed steps 1-3 on this page.
Followed the directions on this page.


When I go to my control panel's URL, I get the following error: "An internal server error occurred." There's nothing in my server's "error.log" file.

As a test, I even created a fresh install of v2 on a new server instance, imported my site's data, and tried upgrading that, and I still get the server error.

FWIW, I'm running Apache 2.4, Ubuntu 16.04, PHP 7.0.30, and MySQL v5.7.22.
After doing some more digging in storage/logs, it turns out that the permissions were incorrect on the "cpresources" director. Once I fixed those, the upgrade progressed as normal.