[2020] [Crash/Freeze]Game crashes when saving

Hello everyone thanks for getting in contact with us.

Can I ask if you have updated the game to version 9.1 and which version of DirectX are you using with the game?

If you are using WIndows 10 you are most probably using DX12 but you can check by going to -
C:\Users\username\Documents\Anno 1800\config open the config.ini file in a notepad and find the part that says DeviceType

The game should be able to run in both DIrectX11 and DirectX12 modes but some players have more success with DIrectX11.

First please try making sure your GPU has the latest driver as AMD and Nvidia usually release new ones every month and please make sure your DIrectX version and windows is up to date -
Windows Settings > Update & Security > Windows Update > Check for Updates