Hi! It sounds like you're getting a 500 system overload error and request timeouts when trying to link your Ultenic device, and it leaves you unable to connect. Let's work through this carefully.

To start, when exactly do you see the error? Is it during the app launch, trying to connect to Wi-Fi, or during the linking process? Also, are you using the Ultenic app on your iPhone running iOS 18.5, correct?

Generally, a 500 error means the server handling your device's request is overloaded or encountering a problem, so your app can’t complete the connection. Here are some initial steps we can try:

1. Restart Your Device and App: Sometimes a simple reboot of your iPhone and closing/reopening the Ultenic app clears temporary glitches.

2. Check Internet Connection: Verify your iPhone is on a stable Wi-Fi network and can access the internet without issues. You might try switching between Wi-Fi and mobile data to test.

3. Update the Ultenic App: Ensure the app is the latest version from the App Store, as outdated versions can sometimes trigger errors.

4. Clear App Cache/Data: On iOS, you can try deleting the app and reinstalling it to clear cached data that might cause communication issues.

5. Wait and Retry: Since a 500 error indicates server-side overload, sometimes waiting 10-15 minutes and trying again helps if our servers are busy.

If none of these work, the problem might be deeper on the server side or related to your account/device registration. In that case, we can pursue advanced troubleshooting such as checking account settings or server status.

Could you please confirm the specifics about when the error appears? And have you already tried any of these initial steps? That way I can tailor the next actions better.

Error happens when opening the app- I need to login again and the messages appear

Thanks for the extra detail! So the error shows up right when opening the app and after you log in again, which suggests the app is having trouble maintaining your login session or connecting properly to the server.

Since you're on iOS 18.5, here are some specific steps you can try to resolve this:

1. Force Close and Reopen the Ultenic App: Double press the Home button or swipe up to access app switcher, then swipe the Ultenic app off the screen to close it fully. Reopen and try logging in again.

2. Check for App Updates: Open the App Store, tap your profile, scroll to Ultenic, and update if available.

3. Reinstall the App: Uninstall Ultenic, restart your iPhone, then reinstall from the App Store. This clears any corrupted cache or data causing login issues.

4. Verify Network Settings: Ensure your Wi-Fi connection is stable and isn’t blocking app-related services. If you’re on a restrictive network (like some public Wi-Fi), try a home or mobile network instead.

5. Ensure Time and Date Are Set Automatically: Go to Settings > General > Date & Time and enable "Set Automatically." Incorrect time settings can interfere with login sessions.

6. Check App Permissions: In Settings > Ultenic, make sure permissions like Background App Refresh and Cellular Data are enabled so the app can maintain connection in the background.

7. Restart Your iPhone: Sometimes a simple reboot refreshes network and app states.

In case the error persists after these steps, it might be a server-side problem or a temporary overload with Ultenic’s authentication system. There is some indication from users that temporary issues can happen, and Ultenic recommends patience and possibly contacting support if it goes on6.

If none of the above works, I can help you escalate this so our team can investigate your account and connection logs. Would you like me to guide you through providing device info for that? Or have you noticed if the issue happens on multiple networks or just one?

Let me know how it goes!