To resolve the crashing issues you are experiencing with the Canon Mini Print app on your iPhone 16 Pro Max running iOS 18.2, follow these step-by-step instructions:

1. Update the Canon Mini Print App:
- Ensure you have the latest version of the Canon Mini Print app installed. Go to the App Store, search for "Canon Mini Print," and check if an update is available. If so, install the update as it may contain important bug fixes.

2. Restart Your iPhone:
- Power off your iPhone by holding the power button until the slider appears, then drag the slider to turn it off. Once it is powered off, wait a few seconds and turn it back on. Restarting can often resolve temporary software glitches.

3. Free Up Storage Space:
- Check your available storage by going to Settings > General > iPhone Storage. If your device is low on storage, consider deleting unused apps, photos, or other files to free up space.

4. Reset Network Settings:
- Sometimes, the app may crash due to network issues. To reset your network settings, go to Settings > General > Reset > Reset Network Settings. Note that this will erase all saved Wi-Fi passwords.

5. Reinstall the Canon Mini Print App:
- If updating did not help, try uninstalling and reinstalling the app. Press and hold the Canon Mini Print app icon on your home screen until you see the option to remove it. After uninstalling, go back to the App Store and download it again.

6. Check for iOS Updates:
- Ensure that your iOS is updated to the latest version. Go to Settings > General > Software Update to check for any available updates. Updates often come with patches that resolve app compatibility issues.

7. Consult Canon Support Forums:
- If the problem persists, check the Canon Community forums for similar issues reported by other users. This could provide specific solutions related to your problem. Discussions regarding app crashes can be found here: Canon IVY MINI printer app NONSTOP crashes - [learn more]

8. Contact Canon Support:
- If none of the above solutions work, contact Canon technical support directly. They may offer more tailored assistance based on your specific issue with the app.

Following these steps should help resolve the app crashing issue and restore your ability to print using the Canon Mini Print app on your iPhone 16 Pro Max.