Also tried to load the savegame, I got "Bad allocation" as a response.
Luckily I have a autosave which I can load and allot of oldersaves I can work off but I can't save it.
I tried to save it but It crashed.
citygrid v1.0 12-07-2019 save.zip
citygrid v1.0 18-05-2020 save.tmp.zip
657.943 Loading map C:\Users\**\AppData\Roaming\Factorio\saves\citygrid v1.0 18-05-2020 save.zip: 109287597 bytes.
657.969 Loading level.dat: 314352494 bytes.
657.974 Info Scenario.cpp:187: Map version 0.18.26-0
660.036 Warning Map.cpp:344: Map loading failed: bad allocation
660.107 Error AppManagerStates.cpp
Free space 80 GB. so that should be fine.
No errors on error checking.