I've been building reactjs apps on a windows machine for the past year, running the Visual Studio IIS test server for debugging / testing.
I just installed a windows update pack, rebooted, and my local VS IIS Express server fails to serve my sites anymore-- the only errors reported are:
localhost/:19 GET https://localhost:44332/static/js/main.chunk.js net::ERR_HTTP2_PROTOCOL_ERROR 200
localhost/:19 GET https://localhost:44332/static/js/vendors~main.chunk.js net::ERR_HTTP2_PROTOCOL_ERROR 200
I have no idea where to start debugging this-- this ERR_HTTP2_PROTOCOL_ERROR
seems to have a bunch of possible causes. Rebooting, clearing my browser caches, using incognito mode, using other browsers all seem to have the same problem.