When I tell NSB to run the PlaySound example in the Desktop Browser it runs but sends these error messages to the console:
appstudioFunctions.js:1008 The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. Autoplay policy in Chrome - Chrome Developers
NSB.initSound @ appstudioFunctions.js:1008
DevTools failed to load source map: Could not load content for http://127.0.0.1:55261/PlaySound/toolbox/bs4/dist/js/bootstrap.bundle.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for http://127.0.0.1:55261/PlaySound/toolbox/bs4/dist/css/bootstrap.min.css.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
P.S., all sounds are properly played when buttons are pressed.