emukit: Does not work

I tried your site, and it fails to load resources. After cloning this repo and doing npm install/start it failed to download PS1 bios, after patching that, I tried to load a z64 rom, and it fails with the following exceptions…

TypeError: context.createVertexArray is not a function
    initScene http://127.0.0.1:8000/assets/frontend/bundle/libretro.js:983
    onload http://127.0.0.1:8000/assets/frontend/bundle/libretro.js:1449

[XmlHttpRequest] Direct file system constructor usage is deprecated for this file system, and will be removed in the next major version. Please use the 'XmlHttpRequest.Create({"index":"file index as an object","baseUrl":"/assets/frontend/bundle/"}, callback)' method instead. See https://github.com/jvilk/BrowserFS/issues/176 for more details.

THREE.WebGLRenderer: image is not power of two (1680x936). Resized to 1024x512 
<img src="/assets/img/cover.png" width="1680" height="936">


Error: WebGL warning: texImage2D: Invalid internalformat: 0x8058

Error: WebGL warning: checkFramebufferStatus: Framebuffer not complete. (status: 0x8cd6) COLOR_ATTACHMENT0Attachment has no width or height.

uncaught exception: abort(8) at jsStackTrace@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:1017:13
stackTrace@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:1034:12
abort@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:13378:44
nullFunc_iii@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:11720:466
b8@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[8626]:0x493a79
_input_joypad_pressed@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[2344]:0x163d6b
_rwebinput_is_pressed@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[2339]:0x163337
_rwebinput_input_state@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[2331]:0x162c19
_input_keys_pressed@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[1237]:0xf67bd
_runloop_check_state@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[594]:0xa40e6
_runloop_iterate@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[593]:0xa361b
_emscripten_mainloop@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[2326]:0x162576
dynCall_v@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_libretro.wasm:wasm-function[8585]:0x4936a0
Module.dynCall_v@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:12998:37
browserIterationFunc@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:1851:18
runIter@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:1968:13
Browser_mainLoop_runner@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:1906:26
requestAnimationFrame/<@http://127.0.0.1:8000/assets/frontend/bundle/parallel_n64_mr_libretro.js:2312:20

TypeError: bindVertexArray is undefined