Bug with files : CommonRes\wb_mp_objects_a.brf

[MLP_Flower]

Hi guy's !
My english is very poor, i do hope that you can understand my problem ^^" !
So here it comes : when i launch my game after moding it with Ice and Fire, during the chargement, a error message appear : "Unable to find : CommonRes\wb_mp_objects_a.brf"
How can i solve it ?
Thank you for reading my bad english and have a good day ^^