After verifying my game cache and reinstalling, this error appears no matter what combination of mods I have installed. None, all of them, just a few, doesn't matter. The curious thing is that it reports to "#lostpassage_crashes" which would indicate that it's my mod that is causing this issue, despite the issue happening whether or not I have my mod installed.
After getting a starting item from Fssh, she says "me" instead of "my". It's possible this was done on purpose to give Fssh an accent, but I don't see any other piece of dialogue where she does have one so it's safe to say it's a typo.