A lot of crashes with 7.0 or later now. Can't even start single mission in New battle mode. The log file contains strings complains about missing maps like this:
[15-06-2021_17-10-57] [INFO] Active mods:
[15-06-2021_17-10-57] [INFO] - xcom2 v1.0
[15-06-2021_17-10-57] [INFO] - TWoTS v2.49
[15-06-2021_17-10-57] [INFO] Loading begins...
[15-06-2021_17-10-57] [INFO] Pre-loading rulesets...
[15-06-2021_17-10-57] [INFO] Loading vanilla resources...
[15-06-2021_17-10-57] [INFO] Loading rulesets...
[15-06-2021_17-10-58] [INFO] Loading rulesets done.
[15-06-2021_17-10-58] [INFO] Loading ended.
[15-06-2021_17-10-58] [INFO] Loading fonts... Font.dat
[15-06-2021_17-10-58] [INFO] Lazy loading: 1
[15-06-2021_17-10-58] [INFO] Loading custom palettes from ruleset...
[15-06-2021_17-10-58] [INFO] Making palette backups...
[15-06-2021_17-10-58] [INFO] Data loaded successfully.
[15-06-2021_17-10-58] [INFO] Loading language...
[15-06-2021_17-10-58] [INFO] Language loaded successfully.
[15-06-2021_17-10-58] [INFO] OpenXcom started successfully!
[15-06-2021_17-10-58] [INFO] Playing flx, 320x200, 200 frames
[15-06-2021_17-11-00] [INFO] SDL_mixer initialized successfully.
[15-06-2021_17-11-17] [WARN] MAP_COLDISLE not found in en-US
[15-06-2021_17-11-17] [WARN] STR_NAGA_G not found in en-US
[15-06-2021_17-11-23] [FATAL] A fatal error has occurred: Segmentation fault.
[15-06-2021_17-11-23] [FATAL] 0x5b6d50 OpenXcom::CrossPlatform::stackTrace(void*)
[15-06-2021_17-11-23] [FATAL] 0x5b7bc0 OpenXcom::CrossPlatform::crashDump(void*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
[15-06-2021_17-11-23] [FATAL] 0x41c7f0 signalLogger(int)
[15-06-2021_17-11-23] [FATAL] 0x9ba390 OpenXcom::UfopaediaStartState::think()
[15-06-2021_17-11-23] [FATAL] 0x7ffdffb7fd40 _C_specific_handler
[15-06-2021_17-11-23] [FATAL] 0x7ffdffb94910 _chkstk
[15-06-2021_17-11-23] [FATAL] 0x7ffdffaf3830 RtlWalkFrameChain
[15-06-2021_17-11-23] [FATAL] 0x7ffdffb93770 KiUserExceptionDispatcher
[15-06-2021_17-11-23] [FATAL] 0x690e80 OpenXcom::Surface::blitNShade(OpenXcom::SurfaceRaw<unsigned char>, int, int, int, bool, int) const
[15-06-2021_17-11-23] [FATAL] 0x51bac0 OpenXcom::BattlescapeState::BattlescapeState()
[15-06-2021_17-11-23] [FATAL] 0x526770 OpenXcom::BriefingState::btnOkClick(OpenXcom::Action*)
[15-06-2021_17-11-23] [FATAL] 0x5d3850 OpenXcom::InteractiveSurface::handle(OpenXcom::Action*, OpenXcom::State*)
[15-06-2021_17-11-23] [FATAL] 0x68d2e0 OpenXcom::State::handle(OpenXcom::Action*)
[15-06-2021_17-11-23] [FATAL] 0x5cef20 OpenXcom::Game::run()
[15-06-2021_17-11-23] [FATAL] 0x41c950 SDL_main
[15-06-2021_17-11-23] [FATAL] 0x9bbec0 console_main
[15-06-2021_17-11-23] [FATAL] 0x9bbfe0 WinMain
[15-06-2021_17-11-23] [FATAL] ??
[15-06-2021_17-11-23] [FATAL] ??
[15-06-2021_17-11-23] [FATAL] 0x7ffdfee57960 BaseThreadInitThunk
[15-06-2021_17-11-23] [FATAL] 0x7ffdffb4a2d0 RtlUserThreadStart
[15-06-2021_17-11-28] [FATAL] OpenXcom has crashed: Segmentation fault.
Even if I update item.rul file the game crashes at any map in New battle mode. Additionally I got crash trying abort alien assault mission in Antarctica. Save file attached
Downgraded my OXCE to 6.8.4 (not latest in v6 brach tree but can't find latest 6.9 commit number yet with git so far, will try rebuild to 6.9 asap to test there, but think what mod require serious recheck due to changes in OXCE 7.0 and later)