Hi there! I'm sorry to hear that you're experiencing the "Sorry, APK exception will be exit" error while trying to open your canvas in HiPaint. I can definitely help you with that!

This error often indicates an issue with the app that might stem from several factors, like recent updates or corrupted files. Let's go through some steps that may help resolve the issue:

### Step 1: Restart the App
1. Close the HiPaint app completely.
2. Reopen the app and see if the issue persists.

### Step 2: Clear Cache and Data
1. Go to Settings on your Android device.
2. Select Apps or Applications Manager.
3. Find and tap on HiPaint.
4. Tap on Storage.
5. Select Clear Cache first, and check if the issue is resolved. If not, try Clear Data (note that clearing data might remove saved settings or projects).

### Step 3: Check for Updates
1. Open the Google Play Store.
2. Search for HiPaint.
3. If you see an Update button, click it to install the latest version.

### Step 4: Reinstallation
If the problem continues:
1. Uninstall HiPaint from your device.
2. Restart your device.
3. Reinstall the app from the Google Play Store.

### Step 5: Check Online Discussions
Sometimes, other users may have experienced similar issues, and community solutions can be helpful. For instance, there's a conversation on Reddit discussing this specific error message and some workarounds: App instability since most recent update.

If none of these steps resolve the issue, it could be beneficial to contact HiPaint support directly at [email protected] for further assistance.

Can you let me know how it goes? Are you satisfied with the solution I provided?