Emergency: keynote file damaged and can't open

Emergency:

I just finished a 60 slides keynote, then I tried to open it in my iPhone to practice.

However, when opening the file, the iOS version keynote crashed.

I was surprised. Then, I go back to macOS keynote, trying to open the file, but it can not either.

The macOS keynote says "the file is damaged and can't be opened."

The file is stored in iCloud, surprisingly, the historical versions also don't work.

Possible reason:

Today, I just updated the IOS keynote to the latest version, the macOS one remains the older version. I suspect there is a bug in the new IOS version keynote that damages the file.

I updated my macOS keynote to the latest one, but it does not work.

Emergency:

I have to give the presentation tomorrow, and that is my PhD defense. I have no time, and not possible to make all the slides and animations again.

I tried to rename it to zip, extract, and compress again, it does not work.