Issue description
2D floor maps are not in color for non-NavVis data. Shown below is an example where the floor maps are black and white or grey.
Troubleshooting procedure
For the map generation the color information is taken directly from the Point cloud. So if the point cloud in that specific area is grey/black, then this is the only information that the map generator can work with. Hence this explains the output.
You may consider opting for "Simple Maps" instead of "Colored Maps" however, this will only give you the outlines and might be more feasible in some cases.