Occurrence:
When trying to connect to the central server using Leapfrog Geo, I receive the following error when clicking on the server:
Log in failed. Server is a Classic Server.
Resolution:
This error indicates that the version of Leapfrog being used in incompatible with the Central server its connecting too. Ensure you are using a compatible version of Leapfrog.
To check compatibility refer to this article.
If you need to upgrade Leapfrog Geo please download the installer from this page: https://my.seequent.com/releases/leapfrog-geo/latest
Root Cause
Incompatible version of Leapfrog.