Dear Michael,
I fixed the issue in the GROMACS importers (trajectories, .gro) on macOS that was causing the options to be disabled and was also affecting the GROMACS Wizard. Could you please check whether the GROMACS Wizard and loading of GROMACS trajectories now work for you?
Sorry about the issue. Which version of Manjaro Linux and NVIDIA drivers do you have? We will install it to see what the origin of the issue might be and how to fix it.