Check these out:
- [Solved] Transfer Lastpass data to Bitwarden via CSV (View topic) • Apache OpenOffice Community Forum
- Importing data from Last Pass error
- https://www.reddit.com/r/Bitwarden/comments/llw1h9/import_from_lastpass_data_is_not_formatted/
This did all the magic to find the links up there:
Google Search: “data is not formatted correctly” “bitwarden”