Zuhl3156
Stuck mission is still stuck. I got a radio message about Warwick Homestead being under attack and when I got there the guy I was supposed to talk to was stuck inside of a tank. I couldn't talk to him so the mission failed. I got a feeling that something went haywire with the game. I'd better load a save and find out.
Were you doing any mods at the time this happened? Based on my experience with a situation like that I have never received a fail for that mission. In fact, I had one that I didn't go back and speak with Preston for a long time and it self canceled but awarded me the XP for that mission.
In one of my settlements, (forgot the name) it's along the river and when I sent provisioners to it they both got stuck on a building roof along side some boulders that provided a small path to it. Finally, after trying to move them I created a concrete floor and bridged the gap between roof and boulder. They immediately left. Left the floor there just in case. LOL Idiots!