This site can’t provide a secure connection

Question

Have created a new Azure Static Web App. Consists of a very simple Hello World type page (index.html) just to try and diagnose issue. No custom domain set up.

I get
This site can’t provide a secure <sitename>.azurestaticapps.net sent an invalid response.
Try running Windows Network Diagnostics.
ERR_SSL_PROTOCOL_ERROR

Seems similar to https://learn.microsoft.com/en-us/answers/questions/721303/static-web-app-is-returning-a-34this-site-cant-pro.html

I've tried with the free and paid plans. Same result.

Any ideas? I've created Static Web Apps previously without any issues. If I don't find a solution soon I'll have to look at hosting elsewhere.

Answer 1

@Toby Austin thank you for reporting this issue. Would it be possible to share the app URL so we can investigate further? We have a similar issue reported on GitHub

After diving further into this, it turns out that the ISP had blocked the domain due to phishing concerns. We believe this is happening as new SWA's may have the '.1.azurestaticapps.net' subdomain. This new subdomain is a side effect of architectural improvements and for the most part should be transparent to interactions with SWA.
If you are hitting SSL_PROTOCOL_ERROR or hitting DNS issues when reaching the default hostname of your SWA, you may need to contact your ISP to allowlist your domain as they may have incorrectly flagged it.
We will keep this issue open so others may comment if they are hitting similar issues with their ISPs.

Would you mind sharing what's your internet provider?