This is more like an alert, than a real bug and it is not that important to be fixed at the moment either, imo.
Earlier, I tried to run a simulation (with PDF report and report dashboard options enabled) when I did not have a working internet connection. It lead to a runtime error caused by Komoot (the map library) as it could not download some image data for the map. So offline users (for e.g.: off-the-grid off-grid system modelers 😝 ) will run into this.