I tried getting to Muluna (https://mods.factorio.com/mod/planet-muluna) and it's seemingly softlocked at the planet discovery research, building a thruster doesn't make the moon accessible from GleNauvbais orbit. It shows up in the stops I can select, but it says inaccessible from current position.
Thanks for the report. I have a good idea what the issue is. I'll try and find time to make a fix soon.
In part, it's due to the fact this isn't strictly intended for use with other planets - but in principle it can. I'll make the fix when I can.
Thanks
Jack