Hello @rwmacgregor,
My name is Henry and I am happy to assist with your inquiry, and appreciate you contacting LastPass Support!
I am sorry about the issues you are having with your account. I verified the login history on your account but could not find failed login attempts from the last 3 days. The only failed attempt I could find recently was due to a verification email being sent. I would suggest to clear cookies and cache in Opera or try to reinstall the extension if trying to log in from there.
If the issue persists, please contact our support team using the "Request help logging in" link found on this article.
Thank you,
Henry | Customer Care