[08-07-2020_12-41-08] [INFO] SDL_mixer initialized successfully.
[08-07-2020_12-41-20] [FATAL] A fatal error has occurred: Segmentation fault.
[08-07-2020_12-41-20] [FATAL] 0x5a1100 OpenXcom::CrossPlatform::stackTrace(void*)
[08-07-2020_12-41-20] [FATAL] 0x5a1f70 OpenXcom::CrossPlatform::crashDump(void*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
[08-07-2020_12-41-20] [FATAL] 0x41c7f0 signalLogger(int)
[08-07-2020_12-41-20] [FATAL] 0x97ffe0 OpenXcom::UfopaediaStartState::think()
[08-07-2020_12-41-20] [FATAL] 0x76e471cc _C_specific_handler
[08-07-2020_12-41-20] [FATAL] 0x76e5be00 _chkstk
[08-07-2020_12-41-20] [FATAL] 0x76e2fed0 RtlInitializeResource
[08-07-2020_12-41-20] [FATAL] 0x76e5b510 KiUserExceptionDispatcher
[08-07-2020_12-41-20] [FATAL] 0x5265d0 OpenXcom::DebriefingState::recoverAlien(OpenXcom::BattleUnit*, OpenXcom::Base*)
[08-07-2020_12-41-20] [FATAL] 0x527920 OpenXcom::DebriefingState::prepareDebriefing()
[08-07-2020_12-41-20] [FATAL] 0x52ca20 OpenXcom::DebriefingState::DebriefingState()
[08-07-2020_12-41-20] [FATAL] 0x510a50 OpenXcom::BattlescapeState::finishBattle(bool, int)
[08-07-2020_12-41-20] [FATAL] 0x5b9360 OpenXcom::Game::run()
[08-07-2020_12-41-20] [FATAL] 0x41c950 SDL_main
[08-07-2020_12-41-20] [FATAL] 0x981b10 console_main
[08-07-2020_12-41-20] [FATAL] 0x981c30 WinMain
[08-07-2020_12-41-20] [FATAL] ??
[08-07-2020_12-41-20] [FATAL] ??
[08-07-2020_12-41-20] [FATAL] 0x76ce5560 BaseThreadInitThunk
[08-07-2020_12-41-20] [FATAL] 0x76e43710 RtlUserThreadStart
[08-07-2020_12-41-23] [FATAL] OpenXcom has crashed: Segmentation fault.
That should be the relevant part, let me know if you need the rest of the log or the save file.