LNDHub is being deprecated and replaced by NWC, we still support it so you can continue using it. Simply click on re-connect and follow the instructions to re-obtain new lndhub credentials and establish the connection. if you need help with this you can check out our guides:
https://guides.getalby.com/user-guide/v/alby-account-and-browser-extension/alby-browser-extension/migrate-from-old-lndhub-setup
-jp