Problem with custom character in a multiplayer system with blueprint

when I program a system with blueprints it works for multiplayer.

with manequins it works but not with my custom characters.

is it a naming convention problem?

This post is in the wrong category, and has no images showing what is wrong or description of what is going wrong.

in my multiplayer 3d game I managed to insert a character created by me with his animblueprint
unfortunately if I put a groom, some hair, on the characters when I start the game, it signals me an error and it doesn’t start
maybe due to insufficient hardware capabilities of the system, but I’m not sure it’s that.