Every time I compile my map, it runs TF2 normally, but when it would normally load the playable map, it does a black screen and crashes completely. I posted the compile log in a log checker, and it found 2 leaked props (even though they were completely inside the giant skybox I put around the map) and a "can't load skybox file skybox/sky_nightfall_01 to build the default cubemap!" message. After hiding the leaked props, the map still crashed. I don't know why it cannot load the skybox texture, it is in my files and on the TF2 sky list (https://developer.valvesoftware.com/wiki/Team_Fortress_2_Sky_List). Please help.