I just got the game a couple of days ago and running version 1.44 and have been enjoying it so far. The game crashed on a save and I now receive the Missing Tag error message when trying to load. Here are the relevant error messages from the error log that are listed in the ‘errors’ .txt file in the debug folder.
16/2/2018 - 16::31 - missing tag: slot_x:…\src\SIM_LoadGame.cpp 2032
16/2/2018 - 16::32 - missing tag: slot_x:…\src\SIM_LoadGame.cpp 2032
16/2/2018 - 16::33 - missing tag: slot_x:…\src\SIM_LoadGame.cpp 2032
16/2/2018 - 16::48 - missing tag: slot_x:…\src\SIM_LoadGame.cpp 2032
16/2/2018 - 17::11 - missing tag: slot_x:…\src\SIM_LoadGame.cpp 2032
This occurred while a few hours in a Giant Factory game in the sandbox mode. I see a lot of bug posts with the same type of errors from older builds but not from any of the more recent builds of the game.