map not loading

Every time I try to run a map everything works until it gets to loading the map, it just loads tf2 like it would if you started it through steam and nothing happens. I don't really know why this happens because all the run map options are default and that seems to work for everyone else. I'm new...

So when I open my map in hammer, the entire map is empty, the file size hasn’t changed, the other maps seem to load just fine. I am really confused and worried right now. The VisGroups tab is also empty for some reason. I also can’t unhide objects. But I can add new entities and brushes

This only happens on 1 map and its the one I have been working on the map, does have a big open level area, since its not done yet, but when I go and run the map it loads for a bit and then when it gets to PortalFlow:.....0.......1.......2 it starts not responding, but it doesn't load TF2 up at...