Suggestion (Required)

The mod can't access configuration files located in subfolders of the main config directory.
For example, Alex's Mobs has a primary configuration file named "alexsmobs.toml" in the root of the config folder, as well as additional config files inside a subfolder called "alexsmobs".
Forge Config Screens can edit "alexsmobs.toml", but not any of the other configuration files within the "alexsmobs" subfolder.

In the root of the config folder:

In the "alexsmobs" folder:

Thanks for the suggestion! Those configs don’t use Forges config system, therefore it’s not possible to support them.