@bofei li Thanks for sharing the updates here. I'm glad that you are able to access the custom vision portal and you are not facing this issue any more.
Issue:
You are unable to access https://www.customvision.ai/projects
Fix:
The issue is self mitigated for now.
If you encounter the same issue again in future, please collect the HAR traces and get back to us.
I would be happy to help.