use the import function of the engine to add all the required files to the project or go to the content folder of the project in your system explorer (file explorer) and create a folder and put the files in. they should be there. then create a animation blueprint (right click) and check if that works.
Thank you for teaching me.
I confirmed that I have been added to the project.
As a new solution, when I retarget animation, I solved it.
Is this the correct solution?