title: "Failed to load resource: net::ERR_HTTP2_PROTOCOL_ERROR" for React app after upgrading to Visual Studio 2019 16.10.0
body: <p>After upgrading to VS 16.10.0 (and then 16.10.1) Community Edition a React website no longer runs w/in Visual Studio/IIS Express. The exact same code was just deployed to an Azure app service and works correctly.</p>
  <p>The home page is blank and the following error is displayed in the Chrome (Version 91.0.4472.77 (Official Build) (64-bit)) debugger console</p>
  <p>&quot;Failed to load resource: net::ERR_HTTP2_PROTOCOL_ERROR&quot;</p>
  <p>The solution consists of:</p>
  <ul>
  <li>C# class library (.NET Core 3.1)</li>
  <li>C# Web API (.NET Core 3.1)</li>
  <li>React website</li>
  </ul>
  <p>I have tried the following:</p>
  <ul>
  <li>Cleaned and rebuilt solution</li>
  <li>Cleared browser cache</li>
  <li>Uninstalled and re-installed Visual Studio</li>
  <li>Upgraded Visual Studio from 16.10.0 to 16.10.1</li>
  <li>Ran npm run build which ran with no errors</li>
  </ul>
  <p>Additional Note: I was able to restore a virtual machine w/ Visual Studio 2019 v16.9.4 instead of v16.10.1. Then step by step I installed the latest Windows updates and the exact code base. The site runs correctly in v16.9.4. So the problem seems to be in Visual Studio v16.10.0/v16.10.1</p>
  <p>Go to the VS Developer Community and up vote this problem</p>
  <p><a href="https://developercommunity.visualstudio.com/t/Failed-to-load-resource:-net::ERR_HTTP2_/1446262" rel="noreferrer">https://developercommunity.visualstudio.com/t/Failed-to-load-resource:-net::ERR_HTTP2_/1446262</a></p>