Hi there! I understand that you're having trouble with the Costco app not loading. Let's figure this out together!

First, can you tell me if you're using your Mac to access the app, or is it on a mobile device? Additionally, have you tried any troubleshooting steps so far, like restarting the app or checking your internet connection? This info will help me assist you better!

Rebooted iPad but no joy

Thanks for the extra detail! Let's see if we can resolve this issue with your Costco app on your iPad. Since you’ve already rebooted the device, here are a few more steps to try:

1. Check for Updates: Make sure your iPad software and the Costco app are up to date. To check for software updates, go to Settings > General > Software Update. For the app, open the App Store, tap on your profile icon at the top right, and scroll to see if the Costco app needs updating.

2. Force Close the App: Sometimes, simply closing and reopening the app can help. To do this, swipe up from the bottom of the screen (or double-click the Home button) to view the app switcher, then swipe up on the Costco app to close it.

3. Reinstall the App: If the problem persists, uninstall the app and then reinstall it. Press and hold the Costco app icon until it jiggles, then tap the "x" to remove it. After that, go to the App Store and download it again.

4. Check Network Connectivity: Ensure that your iPad is connected to the internet. Try loading a different app or website to confirm that your connection is stable.

5. Reset Network Settings: If you suspect that your Wi-Fi might be the issue, you can reset your network settings by going to Settings > General > Reset > Reset Network Settings. Note that this will erase saved Wi-Fi passwords.

6. Clear Cache (if possible): Some apps allow you to clear cache and data within their settings. Although the Costco app may not have a direct option, reinstalling the app usually clears any cached data.

If after all these steps the app still won't load, there could be deeper issues that may require further support. You might also want to check if there are any ongoing outages or issues with the app itself, as sometimes this can occur.

Let me know how these steps work for you, or if you need further help! Are you satisfied with the solution I provided?