Hi! I understand your Rakuten app on your iPhone opens the store but then just shows a blank screen. Let's try to get this sorted out for you.

First, to clarify—when you say it goes to the store and then a blank screen appears, do you mean it opens the app store page inside the Rakuten app or redirects to Safari/App Store and then the screen is blank? Also, is this a recent issue or has it been happening for a while? Any updates or changes recently on your device?

Meanwhile, here are some steps we can try to fix this:

1. Restart Your iPhone
Sometimes a simple restart clears temporary glitches. Hold the power button and slide to power off, then turn it back on.

2. Check Network and Ad-Blocker Settings
On iPhones, some ad-blockers or DNS-level blockers cause apps to not load content properly. If you use any ad-blocking apps or VPNs, try disabling them temporarily to see if the app loads correctly.

3. Force Quit and Reopen the Rakuten App
Swipe up from the bottom (or double-click the home button) to access the app switcher, then swipe away the Rakuten app to close it. Then reopen it.

4. Clear App Cache / Reinstall the App
iOS does not let you clear cache directly, so uninstall the Rakuten app by holding its icon and tapping “Remove App,” then reinstall it from the App Store. This often fixes loading issues.

5. Check for iOS and App Updates
Make sure your iPhone’s iOS is up to date (you mentioned 18.6.2 which sounds current). Also, check the App Store for any Rakuten app updates.

If you've tried any of these already, please let me know which ones, so I can guide you further. If not, give these a try and tell me if the problem persists or changes.

Are you okay trying these? I’m here to help!