Extract the contents using a program like WinRAR or 7-Zip. Ensure you do not "zip the folder" into a subfolder; the game files should remain in the root directory of the extraction for the game to load correctly.
In Rise to Ruins , world save data is often stored in .zip format. If you are trying to edit a save, you must select the files inside the folder and zip them directly, rather than zipping the parent folder. Update 1c :: Rise to Ruins General Discussions File: Rise.to.Ruins.1c.zip ...
If you have downloaded this as a standalone .zip file (common for DRM-free versions from Itch.io or GOG ): Extract the contents using a program like WinRAR or 7-Zip
Some players reported game crashes shortly after opening certain villages (like Northoak) immediately following this update. If you are trying to edit a save,
Installed via Steam on approximately July 22, 2020.