Anti virus blocking , make steam.exe and game own name.exe as whitelist apps.

Also why many games asap doing save first before actual even play the game today.

The response above makes no sense. First of all, it's got nothing to do with anti-virus programming. The second sentence is gibberish. I often wonder whether it's a language problem or some other issue when I see stuff like this. But enough about that.

For anybody else who encounters this problem and accesses this thread, looking for resolution, go here: https://customersupport.frontier.co.uk/hc/en-us/articles/360011881540--Failure-to-save-error-when-saving-in-Planet-Zoo

You don't really need the .bat file that they offer if you know how to access the C:\Users\%username%\ folder. Just make a new folder named Saved Games therein. It's a wonder why the game does not just do this on its own.

This thread was quite old before the recent post, so we're locking it to prevent confusion.