Unless you've got several dozen mods going wiping the slate clean is generally the fastest way to solve odd problems such as that (problems which aren't mod related) rather than to troubleshoot it for several hours. Just save your career folder if you want to continue on any you started and paste it back into the new folder that gets created. Now if you can start a new career and it works fine, but saved careers ctd or you materialize in a wall your sadly sol, that pretty much points to corrupted savegames.
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