Anyone else CORS error on Azure portal. I can't even access the support page to get any help.

Question

Anyone else CORS error on Azure portal. I can't even access the support page to get any help.

TryCatchThis 0

I'm getting a "..." with nearly every request in Azure portal. I can't even get into the Azure support page. Looking at the page, I see CORS issues in Azure. I don't have any browser extensions and the same thing is happening on Edge and Chrome.

Access to fetch at 'https://portal.azure.com/Content/Dynamic/0UBq5PfafP2x.js?retryAttempt=1.8838074813087449' from origin 'https://sandbox-1.reactblade.portal.azure.net' has been blocked by CORS policy: Permission was denied for this request to access the unknown address space.

TryCatchThis 0 Reputation points

2025-12-15T23:06:57.9266667+00:00

I think it is related to my VPN. I tried it on a different PC not connected to work and it works. Strange. Not sure why it manifests as a CORs error.
Rukmini 11,470 Reputation points Microsoft External Staff Moderator

2025-12-15T23:10:35.8866667+00:00

TryCatchThis Because HTTPS traffic is intercepted and rewritten by your VPN (SSL inspection/proxying). Because Azure responses now originate from private or changed addresses, the browser's security model rejects them and reports it as a CORS error despite the fact that network interception—rather than CORS

So is the issue resolved?

1 answer

Your answer

TryCatchThis 0 Reputation points

2025-12-15T23:06:57.9266667+00:00

I think it is related to my VPN. I tried it on a different PC not connected to work and it works. Strange. Not sure why it manifests as a CORs error.
Rukmini 11,470 Reputation points Microsoft External Staff Moderator

2025-12-15T23:10:35.8866667+00:00

TryCatchThis Because HTTPS traffic is intercepted and rewritten by your VPN (SSL inspection/proxying). Because Azure responses now originate from private or changed addresses, the browser's security model rejects them and reports it as a CORS error despite the fact that network interception—rather than CORS

So is the issue resolved?

Answer 1

Rukmini 11,470 Microsoft External Staff Moderator

Hello TryCatchThis,

Clear Your Browser Cache: Sometimes, cached data can cause issues. Clearing your browser cache might help alleviate the problem.
Check Network Settings: Ensure you are not behind a restrictive firewall or a VPN that might be affecting your access.
Disable Any Security Software Temporarily: If you have any firewall or antivirus software, try disabling it temporarily to see if that resolves the issue.
Try Accessing from a Different Network: If possible, switch to a different internet connection (like mobile data) to see if the problem persists.

Let me know if any further queries - feel free to reach out!

TryCatchThis 0 Reputation points

2025-12-16T13:47:09.3966667+00:00

Thanks for the info @Rukmini. I didn't know that. The problem didn't get resolved but I have a work-around. I think this thread can be considered closed. Thanks again for your help!
Rukmini 11,470 Reputation points Microsoft External Staff Moderator

2025-12-16T14:08:44.2366667+00:00

Hello TryCatchThis

If the resolution was helpful, kindly take a moment to accept the answer and upvote it 👍 it as a token of appreciation.

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Anyone else CORS error on Azure portal. I can't even access the support page to get any help.

1 answer

Your answer