ERROR> https://webassembly.z19.web.core.windows.net/Calculator/mono...: Uncaught RangeError: WebAssembly.Memory(): could not allocate memory
var TOTAL_MEMORY = Module["TOTAL_MEMORY"] || 1258291200;
That is, if the module doesn’t specify how much memory it wants (and it doesn’t), then it asks for around 1.25 GB.