This error means that the extension failed to find a card that matches the current web page. Here is a list of the requirements for a card to match:
- A card contains the current web page URL in its title, fields or notes. URL matching is flexible, e.g. http://www.amazon.com matches amazon.com.
- A card has a login field. A login field should have Login or Email field type OR one of the following field names: Login, Email, User, User name, User id (+some variations and localized versions).
- A card has a password field. A password field should have Password field type OR Password field name (+localized versions).