Hi there! I see you're getting an error message in the Yahoo Weather app on your iPhone that says: "something went wrong" with "a.toReversed is not a function." That sounds like a software glitch related to the app trying to use a coding function that doesn’t exist or isn’t supported on your device or app version.

To get this sorted, let’s go through some practical steps:

1. Update the Yahoo Weather app – Sometimes these errors occur because the app is outdated and is calling functions not supported by its current version. Go to the App Store, check if there's an update available for Yahoo Weather, and install it.

2. Restart Your Device – Simple, but often effective. Restart your iPhone to clear out temporary glitches in the running apps or system.

3. Clear App Cache / Data – On iOS, you can’t clear cache directly, but you can uninstall then reinstall the app. That removes any corrupted data that might be causing the function call to fail.

4. Check for iOS Updates – Since your iOS is version 18.6.2, make sure it’s the latest version available to you. Sometimes, app functions rely on system features that are supported only in newer OS versions.

5. Try Using Yahoo Weather on Web – If you still see errors after reinstalling and restarting, try accessing Yahoo Weather through the Safari browser on your iPhone to check if the issue is app-specific or account-related.

If these steps don’t resolve the "a.toReversed is not a function" error, it could be a problem on the app's side with how it handles some JavaScript functions internally—something that might need a developer fix in an upcoming app update.

Let me know if you want me to help you with the app reinstall process or checking iOS updates step-by-step. Are you satisfied with this solution so far?