I've checked the import_anatomy_fs.m script for the latest update of Brainstorm and it looks like the modification is still there, so I'm unsure of how I could still be getting the same error.
The Freesurfer folder comes from the same recon-all batch as before, and the recon.log script should look similar to the file Victor uploaded above. I can upload it later if needed.
Any guidance you could provide would be greatly appreciated! I'm not sure how/why the modification import function was able to work for ~40 subjects before failing and producing the same error as before....