I have made numerous tickets about this and have got no response. Ok I got to a system for a patrol and I complete it...I get credit and everything. I leave and i go do a different patrol. Later i get a missions to go back to that system and i can't enter it. The name of the system is gone from my HUD and no option to enter it comes up when i fly into it. This happens ON ALL PATROLs and MISSIONS. I have tried it backwards and do the mission before i go to patrol the system. Same thing happens I get credit i leave and try to go back and can't enter the system. I have tried relogging,reinstancing,resectoring, everything I can think of....Any one else having this problem?
I had a similar problem in beta i was able to work around it but it took some time to figure out. The first thing i would suggest is that you check your character level against that of the mission. If you are the same level you shouldnt have any issues.
I have no clue if this is the reason or if even what i did was an actual work around but I was able to finish all the missions. Now I will say i have been following that same guideline: do only missions at my level or lower and i have been able to do EVERY mission thus far solo. I have had no zones not available to me that i have level missions for,