I made a small video explaining the problem.
Hi Yehor,
It looks like you are actually linking the wrong collection.
The one you want to link is called "STOMP" (all caps)
If you grab the Stomp_Rig, you are just grabbing the sub collection.
You want the master collection.
This is the same for the other characters too.
Hope that helps- but let me know if you're still having issues.
Oh it was pointed out to me that you might be using the older versions of the rigs that are included with the course files, in Blender 5.1
You can use the newer version of the rigs (like the ones from the bootcamp you just completed)
Those versions are fully compatible with newer versions of Blender.
There might be some small differences with the controls - I can't remember if I removed the foot bank and added that to the heel control.
But either way, you have already used the newer versions of the rigs so you already know that.
When it comes to actually animating the character, you don't need to follow along. You will do your version, and I have done mine.
It's all about pixels on the screen and making them do what you want. Follow the workflow, but do it in your way - and you'll be fine.
It's not about copying what I do. It's about watching the workflow and then practising your workflow.
Hope that makes sense.
Thanks for the explanation, I linked bots from this course (https://cgcookie.com/lessons/animation-bootcamp-overview), and there was no issues.