Destryoing a Genarator

I just accepted a misson with the misson goal to destroy a genarator in a system.
So I flew to this system and just noticed that the Ground station where I have to destroy this genarator not appears on the system map. I have checked that I am in the right system and if this station really not appears on my system map. I actually searched every landable planet for itself but I can not find the Ground station.
Is this problem already known or what did I wrong?
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