API docs not building properly

[ashcocc]

Describe the bug
Lots of warnings/errors when building the docs, class inheritance diagrams for each file not properly rendering once built

To Reproduce
Steps to reproduce the behavior:

1. build docs according to docs readme (run sphinx-autobuild . _build/html) and start server

Expected behavior
Presumably autobuilding the api docs using sphinx should work well. It seems like there's probably just some syntax problem somewhere.

Output
Examples of errors below, there are too many to screenshot all of them

Additional context
Add any other context about the problem here.