I renewed my membership on 15-03-2024 for a year (I have the evidence if needed) and I also tried upgrading again just to get in contact with support, but it gives a error if I try. (Makes sense because I already have a premium membership) Help
File a billing support ticket so they can look at your account.
https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/contact-support.html
I had the same problem on only ONE computer. I tried copying the working version from a different computer AND IT WORKED.