The easiest way for someone to help you is to look at your log files. Anything else is just guessing and a waste of time. They will need the entire file. Not a screenshot. Not a copy/paste of an exception you found. The whole thing.
The main log file is named KSP.log
and sits in the same directory as the KSP executable. For default installs on Windows, this is at C:\Program Files (x86)\Steam\steamapps\common\Kerbal Space Program
. You can also right-click KSP in Steam and select "Manage -> Browse local files." By default, Windows will hide file extensions so you may only see the filename as "KSP" and type "Text Document." That's the right one. It's not in the Logs folder.
The log file is regenerated each time you launch KSP. It is most helpful if you reproduce whatever problem you were experiencing and then grab the log file. Do not r