Hey Henry,
The 500 response code is caused by a backend error scenario, so the Chrome console won't tell you what the problem is. The particular error message you are pointing out is a result of the error page having different functionality than normal page, and is to be expected.
Your best bet for figuring out the cause of the problem is probably to look at
the application logs and see what might be going wrong. There's a few
common pitfalls you might be running into that we're working on documenting as well.
Isaac