I found a problem that if you pack the map not in the source folder, then autogro will not pack the map. I tried to pack the level which is located in: Serious Sam TSE/Mods/TheSequel/Levels. And also textures and other things that are located in the folder with the mod. Autogro can pack what is located in the game folder, not in the mod folder. I haven't updated the large source folder for a long time and I don't know how to do it correctly now, but only with this folder I could successfully pack the level. Any tips on how to properly pack levels for a mod?