I can't complete my request, what should I do?

Question

PostgreSQL

How to fix this (just in case, I attach 3 files https://github.com/CraigTyle/Mathexp):

For some reason, without the word “test” and adding “test” to the schema, everything works:
How to fix it so that it all works, by requests, as in the first picture (it worked using the test schema and other things, as in the first picture).

Answer 1

Yes, you started nonsense with this scheme.
Try
SET search_path TO test, public;