I have a fix for that in Edge. See the pics below. Every PC I have tried it on that needs the KB downloaded it worked every time. Can't tell you why it works, it just does. :)
Windows Update Catalog Down
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(99.2, 52%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECG%3C/text%3E%3C/svg%3E)
Carl Green (SiS)
11
Reputation points
https://www.catalog.update.microsoft.com/home.aspx
Trying to download any updates if very hit and miss, the download button shows a blank popup window most of the time or get the following error:
The website has encountered a problem
[Error number: 8DDD0020]
Windows for business | Windows 365 Business
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Carl Green (SiS) 11 Reputation points
2026-06-10T19:09:48.7066667+00:00 Microsoft AI who uses IE anymore, I have tried Edge, Chrome and Firefox they all don't work very well today.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(67.2, 55.00000000000001%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EES%3C/text%3E%3C/svg%3E)
ERIC SHIELDS 5 Reputation points2026-06-11T01:34:46.7866667+00:00 I’ve been experiencing this issue since 6/9, which aligns with the release of the June Patch Tuesday updates. I normally download these updates manually for air‑gapped servers, but attempting to use the direct download links now results in the error shown in the attached image.
The problem isn’t limited to my environment. Colleagues and friends have reproduced the same behavior when accessing the Microsoft Update Catalog from both business and residential ISPs, and across multiple operating systems and browsers, including:
Operating systems tested:
- Windows 11
- Windows Server 2022
- Windows Server 2025
- macOS
Browsers tested:
- Edge
- Chrome
- Firefox
- Safari
All combinations produce the same error.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(35.2, 22%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EK%3C/text%3E%3C/svg%3E)
Kent 0 Reputation points2026-06-17T16:38:58.9666667+00:00 I have a fix for that. Not sure if it will work for everyone but it works every single time I get on a PC to download a KB and goto the catalog website. This is using Edge, see the pics added. I can't tell you why it fixes it, it just does... good ole microsoft.
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4 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 57.00000000000001%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMO%3C/text%3E%3C/svg%3E)
Marc Oo 40 Reputation points2026-06-12T08:19:24.23+00:00 Hello;
Same issue on Windows Server 2022 standard or even Windows 11;
Edge brower / Firefox ;
struggling downloading packages;
by refreshing page and popup, after several attempts sometimes you can finally download the package;
today packages are not even showing up on Web page;
process requires to download updates from catalogs;
32 servers to patch; it's kinda painful; but pretty Microsoft will find a way to repair this.
Have a nice day
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Carl Green (SiS) 11 Reputation points
2026-06-11T08:27:02.29+00:00 Pretty sure this is a server side issue at Microsoft. Hopefully Microsoft support might fix it first before I have to raise a ticket to alert them to it.
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ERIC SHIELDS 5 Reputation points
2026-06-11T16:59:18+00:00 Agreed. This is definitely a server issue, given the inconsistency on even the main site, which is hit-or-miss when it populates.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(16, 86%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESN%3C/text%3E%3C/svg%3E)
Scott Nguyen 1,550 Reputation points Independent Advisor2026-06-10T19:35:40.8233333+00:00 Hello, you can try to fix this by clicking the settings icon to the left of the URL, navigating to the site-specific permissions, ensure that JavaScript and DOM storage are permitted and changing "Insecure content" from Block to Allow for the Microsoft Catalog domain.
Also, you got a point that nobody using IE these days, but the infrastructure of the Update Catalog site still relies heavily on legacy web components and URLs that modern browsers treat as unsecure mixed content. When you use Edge, Chrome, or Firefox, they might block these background HTTP download streams from an HTTPS page, which causing the crash.