When your squad meets CCS leader, everyone in squad just instantly dies and then game crashes.
Can you post a copy of your output_log.txt (you can find it in C:\Users\(your username)\AppData\LocalLow\Lazy Dog Software\LCS) to pastebin so I can see the error message you're getting? I can't reproduce this on my machine. If you can post your save file (found in the same folder) that would also be helpful.