FASTER terminate called after throwing an instance of 'GRBException'

[nvhungv2k]

My workspace: Ubuntu 18.04; ROS melodic; FASTER is on origin/master; Gurobi version version 9.1.0, build v9.1.0rc0
I meet this problem as soon as I run:
$ roslaunch faster faster.launch

[nvhungv2k]

I figured out that I missed Gurobi license that creates such exception.
So I've installed Gurobi license, it runs well!