Error message when importing WP mesh

[xxxtigger]

Hey can someone tell me what this error message means?
I am trying to make a sleeping bag bed, and I got the mesh in game, but when i try to put the mesh with WP on it so the covers work I get this message, I have no idea what this means, Can someone explain? Thank you in advance

1drv.ms/i/s!Ao4RzIAHKGpJrYkZlebV7LRw0-PGTw?e=46pLMP

[mauvemorn]

Hi. Make sure you're saving the blend in a version of blender that has s4studio mesh tools
Export the original blend, open, compare it to yours: number of meshgroups, corresponding cut numbers, what bones affect them, names of uv maps, whether any uv is outside of the uv space. Basically, what you import must be adapted the same exact way the original was