Thank you so much. All it took was one action- to refresh my sites by forcing a sync. LastPasss now works like it should.
I had the same problem and after I performed the steps in #4 from this link, Perform Basic Troubleshooting, I was able to launch my sites again. Notice there are helpful links on the left and right of the center list, which I had to use because I didn't know how to perform some of the steps. I hope you're able to get launch to work from this list.
https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/FAQ_Autofill_Issue.html&_LANG=enus
