Hello,
This issue could be due to many reasons, the most common ones in my experience are:
- Double check firewalls or VPN configurations.
- Make sure the datasets and located in the same region as your Azure ML workspace.
- Also, data labeling project and the datasets must be in the same Azure region.
- Don't forget to try on a different browser, and erase chache.
Hope this helps,
Greetings.