Such an error appears when:

The vendor daemon is specified to run on the particular port number that is already used by the other process. The default port numbers for the cameo vendor daemon is 1101.

Both the FLEXnet license server and the cameo vendor are specified to run on the same port number. Default port numbers for the FLEXnet license server are 27000-27009.

You may check and change the port number in the FLEXnet license administrator console.