unable to find assign mission target farm_isherwood_2

# Describe the bug

It seems that the game can't find a suitable place for a quest I got from Mr Lapin, Warrener.

# Steps To Reproduce

1. In the save I uploaded, talk with Mr Lapin.
2. Ask him if he knows anything about the outside world.
3. Ask him if there's anyone nearby you should meet.
4. Tell him that seems like a deal to you.
5. The game will now freeze for some time before giving out the error code in title.
6. Ignoring that error brings you back to the dialogue, as if you accepted that quest, with no map indicator of where to go and you can take that quest again by repeating steps 1-4.

# Expected behavior

After step 4 I expect to get no error code and maybe not even that long of a freeze, before I exit the dialogue and can see on my map where to go. I also expect to not be able to take that quest again.

# Screenshots


# Versions and configuration

- OS: Windows
- OS Version: 10.0 1909
- Game Version: 0.E-9285-g0ec6948-dirty [64-bit]
- Graphics Version: Tiles
- Game Language: English [en]
- Mods loaded: [
Dark Days Ahead [dda],
Disable NPC Needs [no_npc_food],
Bionic Professions [package_bionic_professions],
Aftershock [aftershock],
Blaze Industries [blazeindustries],
C.R.I.T Expansion Mod [crt_expansion],
No Fungal Monsters [No_Fungi],
SpeedyDex [speedydex],
Stats Through Kills [stats_through_kills],
Stats Through Skills [StatsThroughSkills],
Modular Turrets Remake [modular_turrets_remake],
Civilian Salvaged Robots [civilian_salvaged_robots],
Automations [robot_automation],
Magiclysm [magiclysm],
Mythical Martial Arts [MMA],
Aftershock - UndeadPeople Tileset [AftershockUDP],
Blaze Industries - UndeadPeople Tileset [BlazeIndustriesUDP],
Bootleg Walkers [Bootleg_Walkers],
Bootleg Walkers - UndeadPeople Tileset [Bootleg_WalkersUDP],
C.R.I.T Expansion Mod - UndeadPeople Tileset [crt_expansionUDP],
Graphical Overmap [Graphical_Overmap],
Graphical Overmap Magiclysm [Graphical_Overmap_Magiclysm],
Magiclysm - UndeadPeople Tileset [MagiclysmUDP],
Resource Crops [resource_crops],
Mythical Martial Arts - UndeadPeople Tileset [MMAUDP]
]

# Additional context

This is my save:
https://mega.nz/file/BfAQgTwS#sdKMy9k53ri274WLjE_x95GErn8YBffSR9Hr_Juk-Wk

and these (content adding) mods are not shipped with the game:
[non-shipped mods.zip](https://github.com/CleverRaven/Cataclysm-DDA/files/5925251/non-shipped.mods.zip)

Start by reproducing the dialogue sequence with the uploaded save and the listed mods, then investigate the quest assignment error for target farm_isherwood_2. Confirm that accepting the quest no longer freezes or reports an error, places a map indicator, and prevents accepting the same quest repeatedly.

Written by the indexing model from the issue text.