Azure IoT Hub IoT devices page shows permission error

On the Azure IoT Hub's "IoT devices" page I am getting an error:

Unable to retrieve devices. Please ensure a Shared access policy is enabled with necessary permissions [Registry Write Service Connect]

1. I checked the Shared Access Policy iothubowner has all permissions (Registry read/write, service connect and device connect)
2. I'm the only user on the subscription
3. I checked the Activity Log and it shows that I've successfully run the Get all IoTHub Keys operation.

Other potential context:

• I've recently been working with ARM templates and SAS policies to enable an Azure function to be triggered from IoT Hub Lifecycle Events --> Event Hub --> The Azure Function. When removing/adding resources is it possible that I removed a required SAS policy somehow?
• I've been creating/working with the IoT Hub's Message routing
• I've been provisioning/deleting non-IoT Hub resources with ARM templates and the resource groups they create recently.

Any idea why Azure says the permissions are missing? What would the next debugging step be?

It appears this was a transient issue on Azure's side: learn.microsoft.com/en-us/answers/questions/306681/index.html