If you find that your canvas data is missing when you open the app,
it may still be possible to restore it if it was saved to the cloud.
To use cloud features, you need to log in with your pixiv account.
Make sure you are logged in to the the pixiv account that was used to save the canvas to the cloud.
You can check your linked pixiv account from the bottom left of the app's home page.
To learn how to change your linked account, please see below.
Can I change my linked pixiv account or add a new one?