I was tested for 3 cancers because of my weird symptoms and lab results, but my illness still remains a "mystery" to this day. Luckily I didn't have anything life-threatening in the end.
This isn't pay to play, a pay toplay ame would be like: Oh you wanna have Vassals ? Buy premiumiumship. or "You want to buy decorations for your house? Buy premiumship." If you want to see one go play Jumpstart or Animal Jam or something
I'm not really sure about the exact mission right now, but try to read the quest text carefully. Maybe something else is needed, too. Otherwise I would suggest to write a bug report into the official Anno Online forum with some more data. Then we can provide some better help.
 "Pandemic 2"){kind=icon}
 "Anno Online"){kind=icon}
 "Learn to Fly 3"){kind=icon}
 "Spiral Knights"){kind=icon}
 "Destination Kepler"){kind=icon}
 "Reach the core"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Idle Village"){kind=icon}
I was tested for 3 cancers because of my weird symptoms and lab results, but my illness still remains a "mystery" to this day. Luckily I didn't have anything life-threatening in the end.