Hi sbassels,
Thanks for contacting Apple Support Communities!
We understand that Fitness won't open on your iPad. You've done a great job troubleshooting so far! We appreciate you sharing the details of the steps you've taken to address this behavior already.
Do you experience the same behavior if you connect your iPad to an alternate network?
If so, do you have any VPN software installed on your iPad? If you do, you may consider deleting the VPN temporarily then test the Fitness app again. You can learn more about how a VPN can impact network connectivity here: Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity issues - Apple Support
"Check for VPN connections and third-party firewall or security software
Some types of software, including VPN apps or configuration profiles, may have settings or restrictions that can cause connectivity issues. Types of software that could affect connectivity include:
- VPN (Virtual Private Network) apps
- Managed configuration profiles
- Firewall apps
- Anti-virus apps
- Parental control apps
- Content blockers
Review the apps on your device to see if these types of apps or configuration profiles are installed.
On iPhone, iPad, or iPod touch, scroll through your installed apps and check for VPN software or configuration profiles in Settings.
- Settings > General > VPN (even if it says Not Connected)
- Settings > General > Profile (if this option doesn't exist, profiles are not installed)
On Mac, check your Applications folder in the Finder and check for configuration profiles in System Preferences > Profiles.
If any of these types of apps are installed on your device, you may need to delete them to resolve the connectivity issue. Use caution if you choose to do this, since deleting an app or changing a configuration profile could affect how you use your device. For example, if you delete a configuration profile installed by your organization or school, your device may not work with that network."
If you're still experiencing the same behavior on a different network or without any VPN software installed, we'd suggest that you contact Apple directly to investigate this further with you. You can reach them here: Apple Support
Kind regards.