Wave Import Wizard Multiple Unhelpful Errors

Wave Import Wizard Multiple Unhelpful Errors

Trying to import my accounts from Wave into ZOHO using the supplied wizard - I have exported everything into Google Sheets, following the instruction letter by letter, but when I try importing the csv's into ZOHO, I get errors where certain items don't get imported and get skipped, with no indication which ones or why.

This happened both with my 'Chart of Accounts' and with my 'Invoices' and I get no clues whatsoever on why this has happened.

I really would like some help with this and am sorry that I can't give any more info (because ZOHO doesn't give me any more info).