Hello @johannaruth,
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. I have verified our records but don't see any failed login attempts on your account. The issue could be related to the cookies and cache, please try to clear them. If you are having this issue with the browser extension, please follow these steps.
Please let me know if this worked or if further assistance is required.
Thank you,
Henry | Customer Care