for related issues with MES, PAM and other tools utilizing cordinate systems, use the following fix:

In your SE saves folder to go "Storage" - "3351055036.sbm_RealSolarSystems"
Open "config.xml" in the editor of your choice
Amend the following lines to the following:

<VoxelPlanetSpawnRangeMin>0</VoxelPlanetSpawnRangeMin>
<VoxelPlanetSpawnRangeMax>50000</VoxelPlanetSpawnRangeMax>

If the system already exists; Move the central star listed in the Editor. to something like (0,100000,0) and regenerate each planet.

IF a system does not exist; Place the base star at (0,100000,0) or further, and proceed with the planetary generation normally.