Hello @chris.c.zhao chris.c.zhao !
Welcome to Microsoft QnA!
It seems that you are facing two seperate issues
- Bad Gateway , meaning network issues , be careful if you are using a VPN or a Proxy from your end , also check Azure Status Page if there is any problem in the region of your resources
- Read Documents Error: This is pointing at first glance to permissions or acess rights in general. It can be a also and very probable a tjhrotlling issue . Can you post the tier of yous Service ? Is it a Free tier F0 ? Make sure you are not hitting the limits
- Also the first issue may affect the second , so if Network is lost for some seconds , files become unreadable
Kinldy check these details , post if possible how you have your resources configured and some logs if the issue persists. Try another tier like S0 and try again
I hope this helps!
Kindly mark the answer as Accepted and Upvote in case it helped! Regards