Is this where we file bug reports?
Gamma 1.05
I accepted a delivery job from Oramus Legacy in Amait to Legendre Ring in Breksta. The cargo was 3 Cobalt. When I went to plan my route in the Galaxy Map there was no way to get to Breksta. It was too far. I'm in a starting SideWinder with an E2 FSD. Thanks for the bug fine.
Probably not really a bug. If you dumped some modules you could extend your range for example, or sold some other cargo for example. The game cannot work out how you're going to get there. I've finally worked out how to do this without losing the mission screen (probably obvious)
Bring up the mission. Note the destination system.
Tap "1" and bring up the Galaxy Map
Find the system. Plot a route. Jumps only take a few seconds, so you only need to worry about deadlines under 20 minutes or so if you're flying to a binary system. Or if the phone rings!
Set your first destination (usually you only EVER need two jumps in the Sidewinder or Eagle.)
Tap "1" again (I used to tap "2" and wonder why I had to delve back through menus). Focus switches back to the station, and the mission screen is still up.
Accept the mission if you could get there successfully. Otherwise find another mission or look at Commodities for that run.
You can now Launch, spin to the target, Hyperspace and if necessary immediately get setup for your second jump.
I've done exactly what you have (in my case the destination WAS reachable in the Eagle, but it was around 16 circular jumps to get 11Ly from my start point!! We learn the hard way I'm afraid...