ModuleNotFoundError: No module named 'fx'

I have created an app that is called ‘fx’. The installation went smoothly but when I tried to start bench this is what happens.

I checked in the frappe-bench/apps folder and the fx is there so how can ERPNext not find it? Can anyone help me with this?

Btw this is what shows when I access erpnext address…

Add it to apps txt file. Maybe it’s not mentioned there.

Where could I find that?

In frappe-bench/apps or /sites directory. Am not at my computer. But it’s there.

Did you find the solution ?