First unpack M9K Specialties using gmad then open lua\entities\m9k_mad_c4\shared.lua After that find replace it with this

引用自 darkreader2636：

First unpack M9K Specialties using gmad then open lua\entities\m9k_mad_c4\shared.lua After that find

language.Add("ent_mad_c4")

replace it with this

language.Add("ent_mad_c4", "C4")

Thanks you!

It keeps telling me that the file doesn't have a name or something akin to that, any ideas how to fix that?

If you have no clue how to do any of this just download this. Just this addon with the fix
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3130215204

[M9K Specialties] language.Add expects string as second argument!
1. unknown - lua/entities/m9k_mad_c4/shared.lua:171

引用自 Doom reaper：

[M9K Specialties] language.Add expects string as second argument!
1. unknown - lua/entities/m9k_mad_c4/shared.lua:171

just subscribe the the addon above