Crash shortly after finishing a multiplayer game

[Ads20000]

INFO: level_runner.cpp:1472 : SDL WINDOW EVENT RESTORED
INFO: level_runner.cpp:1474 : SDL WINDOW EVENT RESIZED to 1600 x 900
CRITICAL: preferences.cpp:1355 ASSERTION FAILED: Unknown preference setting: max_window_width

CRITICAL: At /home/adam/.citadel//dlc/citadel/data/objects/title_controller.cfg 1283:
game_preferences().set_preference_value('max_window_width', width, [enum pe...
^

---
CRITICAL: stack trace:
CRITICAL:   ./anura() [0xfd1de0]
CRITICAL:   ./anura() [0xfd213c]
CRITICAL:   ./anura : variant::operator()(std::vector<variant, std::allocator<variant> >*) const+0xc7f
CRITICAL:   ./anura : formula_vm::VirtualMachine::executeInternal(game_logic::FormulaCallable const&, std::vector<ffl::IntrusivePtr<game_logic::FormulaCallable>, std::allocator<ffl::IntrusivePtr<game_logic::FormulaCallable> > >&, std::vector<variant, std::allocator<variant> >&, std::vector<variant, std::allocator<variant> >&, short const*, short const*) const+0x1b12
CRITICAL:   ./anura : formula_vm::VirtualMachine::execute(game_logic::FormulaCallable const&) const+0xb4
CRITICAL:   ./anura() [0xca19fd]
CRITICAL:   ./anura() [0xca8abc]
CRITICAL:   ./anura() [0xca9689]
CRITICAL:   ./anura : game_logic::CommandCallable::runCommand(game_logic::FormulaCallable&) const+0x59
CRITICAL:   ./anura : CustomObject::executeCommand(variant const&)+0x61
CRITICAL:   ./anura : CustomObject::executeCommand(variant const&)+0xbc
CRITICAL:   ./anura : CustomObject::handleEventInternal(int, game_logic::FormulaCallable const*, bool)+0x2c1
CRITICAL:   ./anura : CustomObject::handleEvent(int, game_logic::FormulaCallable const*)+0x18d
CRITICAL:   ./anura : LevelRunner::video_resize_event(SDL_Event const&)+0x165
CRITICAL:   ./anura : LevelRunner::play_cycle()+0x2d55
CRITICAL:   ./anura : LevelRunner::play_level()+0x15e
CRITICAL:   ./anura : main()+0x5384
CRITICAL:   /lib/x86_64-linux-gnu/libc.so.6 : __libc_start_main()+0xf1
CRITICAL:   ./anura() [0x6abcc5]
CRITICAL: ---
INFO: asserts.cpp:74 : ATTEMPTING TO SEND CRASH REPORT...
INFO: http_client.cpp:65 : http_client::send_request(this = 0x7f8935d9fb30 @3187131 method_path = POST /cgi-bin/upload-frogatto request.size() = 5629 num_retries = 0 attempt_num = 1)

INFO: stats.cpp:129 : SENT 11172/11172
INFO: http_client.cpp:337 : http_client::handle_receive: error: 0x7f8935d9fb30 @3187544 retry = 0

ERROR: http_client.cpp:343 : ERROR IN HTTP RECEIVE: (2(End of file), )
ERROR: http_client.cpp:345 : Error no such file or directory
INFO: stats.cpp:123 : UPLOAD COMPLETE: ERROR RECEIVING DATA
./anura.sh: line 3: 11762 Aborted                 (core dumped) LD_LIBRARY_PATH=./runtime:$LD_LIBRARY_PATH ./anura "$@"

Longer (but incomplete) Terminal output