Bug: Uncaught ReferenceError: WebAssembly is not defined [demo website]

[danger-ahead]

While trying to open the website, this pops up in console.

main.dart.js:33420 
        
    Uncaught ReferenceError: WebAssembly is not defined
    at La (canvaskit.js:151:54)
    at canvaskit.js:143:415
    at ai3.$1 (main.dart.js:22300:25)
    at aeO.adq (main.dart.js:33446:34)
    at aeO.CL (main.dart.js:33448:21)
    at acy.$0 (main.dart.js:33122:11)
    at Object.rj (main.dart.js:13589:40)
    at an.mn (main.dart.js:33055:3)
    at acq.$0 (main.dart.js:33090:13)
    at Object.aEz (main.dart.js:13621:5)