Uncaught (in promise) RuntimeError: Aborted(CompileError: WebAssembly.instantiate(): expected magic word 00 61 73 6d, found 3c 21 44 4f @+0)

[nupur711]

Getting this error when try to use js file. In the network tab .wasm response has been shown as html file.

[sbc100]

The found bytes (3c 21 44 4f) as ascii for <!do so it looks like you server must serving html rather than that wasm file. I would use the network tab in devtools to see what is being loading and what the server is returning.

BTW, a web search for "emscripten expected magic word 00 61 73 6d, found 3c 21 44 4f " should be able to find this answer.

[kripken]

@nupur711 Also the existing advice in #1031, which this is a duplicate of, has more details about how to debug this type of issue.