How Externals others mods?

Hello! In this thread, I would like to know how it is possible to link other modifications within the MCreator application itself in Workspace?

Here's the situation: I want to make an addon to another modification, in other words, an add-on. So I decided to add the mod itself to run/mods, and tried to link the id of this mod to the lines in the External APIs tab in Workspace settings. But for some reason, when I run the client on the “Run client” button, the console crashes with a FATAL error. This does not depend on the mod I wanted to add. After all, I tried several mods with add-ons, in the form of gekolib and without!

I tried it on: Forge 1.20.1 (47.4.4.0), Mcreator 2025.1

On a completely clean workspace, i.e. I didn't add any items to Mcreator, just tried to load another mod through the folder.

Maybe someone knows how to bind another mod so that when you start the game without it, Minecraft tells you that you need to download 1 more mod. Because I need to use the mod's IDs and so on to make everything work properly. Thank you all in advance, I hope I have written everything in detail. I saw a thread on the forum about this, but it was quite old. It was a mistake: FATAL and a bunch of text.