Gurobi Compute Server version 8.0.0 onwards is able to work with multiple Gurobi releases on the client side.
The server will automatically select the appropriate runtime, depending on the version of the Gurobi Optimizer library used by the client program. The most common reason for the error message "No compatible runtime available for version X.X.X" is that there is a newer version on the client side without a corresponding runtime on the server side. This is most likely because the client has been updated but the server has not.
A Gurobi Compute Server release contains all runtimes for all supported client releases by default. Therefore, we always recommend that you upgrade to the latest server release, even if the client machines still run a previous version.