Hello @whhorstman
My name is Hilda, and I hope you are doing well.
Please make sure you follow the steps on this link to export your vault data. Export vault data from LastPass as a generic CSV file If the issue persists, login via the extension from other browser and repeat the process.
Have a wonderful day and take care!
Hilda
The LastPass Support Team
Please visit our support center at https://support.lastpass.com to access our knowledge base or to contact our Customer Care team.