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I have a .net framework application running on IIS version 10.0.17763.1 hosted on an Azure Virtual Machine and sometimes my users are getting ERR_HTTP2_PROTOCOL_ERROR

This site can’t be reachedThe webpage at https://..../page.aspx might be temporarily down or it may have moved permanently to a new web address. ERR_HTTP2_PROTOCOL_ERROR

I have no idea how to debug and it's an intermittent issue

Below are two screenshots from the developer tools network tab

network request

network header

The only thing that is failing to load is the page.aspx, all the JS and CSS are loading properly.

Guilherme Flores
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  • There are many reasons for this error, you need to further analyze this error, you can refer to this link: [ERR_HTTP2_PROTOCOL_ERROR](https://stackoverflow.com/questions/58215104/whats-the-neterr-http2-protocol-error-about). – samwu Jun 25 '21 at 02:53
  • Hi, check this [thread](https://forums.iis.net/t/1250683.aspx?ERR_HTTP2_PROTOCOL_ERROR). They suggest to *enable https=- true in package.json file* – DarkSideMoon Jun 28 '21 at 09:04
  • Was there a solution found to this problem? We are having a similar problem - not everyone gets the error but we also don't know what the root cause is. – George M Ceaser Jr Nov 24 '22 at 14:40

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