Hi there! It sounds like you're seeing a white screen with the message "site suspended" when trying to open the Nonoki app on your iPhone running iOS 15.8.5. I'd like to help you get this sorted out.

To start, could you tell me a bit more?
- Is this happening right when you open the app, or only when you try to access certain features?
- Have you noticed any recent updates or changes to the app or to your phone before this started?
- Have you tried closing the app completely and reopening it?
- Is your internet connection stable (Wi-Fi or cellular data)?

This kind of message usually indicates that the app is having trouble connecting to its server, or the service hosting part of the app might be temporarily disabled.

Meanwhile, here are some initial steps we can try together:

1. Close and Reopen the App:
- Swipe up from the bottom (or double tap the home button if your iPhone model has one) to open the app switcher.
- Swipe the Nonoki app off the screen to close it fully.
- Open the app again.

2. Check Internet Connection:
- Make sure you are connected to Wi-Fi or mobile data.
- Try browsing a website in Safari to confirm your internet is working.

3. Restart Your iPhone:
- Hold the side button and volume up (or down) button until the "slide to power off" appears.
- Slide to power off, then turn your phone back on.

4. Check for App Updates:
- Open the App Store, tap your profile icon at the top right, and scroll to see if Nonoki has an available update.
- If yes, update the app.

If these steps don’t help, it could be a server-side issue where the site's hosting has been suspended by their provider. In that case, the issue is outside your device, and we might need to contact Nonoki support to verify the status of their service.

Please try these and let me know what happens, and I’ll guide you further!