I can't play it on my phone anymore, anyone else?

A new update (https://www.warzone.com/blog/index.php/2020/11/update-5-06-3/) was released yesterday. Since the Play and App Store take a while to approve and publish the update, your phone might experience issues for a short period due to the older version it is running.

Shouldn't fizzer wait for the update to become available before activating the changes?

It’s activated on the web, but takes longer to hit the app.

My suspicion is you started a level on a web browser and went to continue it on your phone. Since the web browser version is updated, your phone can’t handle it yet.