HTML5 results in black screen 4.11

when packaging the project for html5, the camera renders all black, the ui and inputs are working though.
i already tried to change target hardware to scalabe and / or mobile, yet with no result.

i also tried the same in an all new starter project.
is there an example html5 project which is supposed to package correctly so i can check if it is any setting or a problem with my pc / installation that causes this issue?

also are these installations still required for 4.11? Sharing and Releasing Projects for Unreal Engine | Unreal Engine 5.2 Documentation

any help is appreciated

I believe that documentation page has fallen out of date on UE 4.11. In 4.11, I see that the directory C:\Program Files (x86)\Epic Games\4.11\Engine\Source\ThirdParty\HTML5\emsdk\ contains the Emscripten SDK, and the Emscripten 1.35.0 compiler and Python 64bit are included there. This is a change from previous versions where users needed to install Emscripten SDK manually. I believe all the steps should now be automated, so .ini files don’t need to be edited anymore either.

I have been able to package at least StrategyGame and TappyChicken demos to HTML5. They both do pop up the “this demo wasn’t written for html5 support” (or similar) dialog when exporting, but still seem to work ok apart from that.

Yes, you only need to use those steps if you’re on a build prior to 4.9.