probleme ' La valeur ne peut pas être null
hi your project is great when start it i have error

It is possible the abilities file is missing - there was a similar problem before as well. There should be an abilities GDF file in a folder called I believe game data or something like it together with the game exe in the bin folder. I cannot check the specs because I'm on. My phone now. Normally it is supposed to copy that file during building built it might be broken as I already have that file. Check for this.
I will see if I can repro on a clean machine but I don't have one right now.
Also you seem to be missing the GameObject assembly for some reason - there might be some remnants in the _3DGame namespace that I forgot to remove but they're very old and don't load anything properly I think
yes you can help my for found this, thanks
hi are you good, i got this new error
and then i add gameobject into project i got this second error
any help for fix this, thanks
monogame version 3.6.0.1625 build x86 net framework 4.5.2