Account blocked downloading any Insider ISO

This happened to me last September and I have been unable to download anything Insider related since. I'm a home user using a standard broadband connection, no VPN or anything like that. In my case I thought it might have been self inflicted as I started a download and everything seemed to freeze. I waited a little while and clicked 'download' again. There was no indication anything was happened until I went to close the browser (Edge) when a message said doing so would cancel three downloads that were in progress. I cancelled the three downloads and from then on have not been able to get any more. Same message as the OP has posted.

I did raise a support ticket and ultimately was told it was most likely an IP block following what I had done and that it would clear. It has not. I have actually waited until just a few days ago before trying again. Still the same.

 OLDMAN2018​ mentioned this:

 It also happened in Edge and on my cell phone using Cellular and it's proprietary browser. 

Which I assume assigns a totally different IP to a home network so that kind of puts in doubt what Microsoft have told me.

Copilot collated some information as I got frustrated with this a couple of days ago and I am 'told' that any block is not account based. Hmmm.

Extract from Copilot:

Microsoft sometimes rate‑limits or temporarily blocks IP ranges when:

• A download is interrupted repeatedly

• A CDN node flags unusual traffic

• A region’s traffic triggers automated anti‑abuse systems

These blocks can last far longer than expected because they’re automated and not tied to your Microsoft account — they’re tied to your IP or region.

None of Microsoft’s official troubleshooting pages address IP‑based blocking directly, but they do confirm that network‑related issues, proxies, VPNs, or misconfigurations can prevent Insider access.