Error importing csv and direct from lastpass. I'm stuck

Use the Windows Notepad application to inspect your csv file. It loads the csv file and doesn't process it in any way, displaying its raw content. Check the given position again, and check near that position as well - often, parsers are unable to locate the exact position in the text. It might be the given position is where the closing quote is expected but not found, and the opening quote is somewhere in front of it or even in the previous line(s) - all depending on the csv formatting itself.

If you're unable to find why there is an unbalanced quote being reported, you should at least be able to recognize which Lastpass entry in line 831 is referenced. Go to Lastpass and check this entry. Check if there is some unusual text somewhere, or if you perhaps entered some quote in some free text field. Edit that text, create a new csv and try again. If that entry is not relevant for you any more, simply delete it to exclude it from the csv.