When I added the newer version ,4.0,  I got an error when I launch my map. It says:

Server script compile error
animation 'pb_dw_dive_prone_land' not defined in anim
tree 'generic_human'
(see console for details)

did u add the anim tree to mod.csv or forget to tick it in iwd if its there?

Yes it is checked but it is not in the mod.csv. How do I add it there?

this error means that the animation is not in the animate generic  human, for any animation added to the game it needs to be in a animate