Unable to load file 【subtitles-octopus-worker.wasm】

[beiona]

First of all，The 【JavascriptSubtitlesOctopus】 is an amazing projects！

Chrome F12 under the 【Sources】
【subtitles-octopus-worker.js】-【my domain name】-【JavascriptSubtitlesOctopus-master\dist\js】
the file 【subtitles-octopus-worker.js】loaded sucessfuly

But most time，I can't load the file 【subtitles-octopus-worker.wasm】， there is no subtitles on my screen。And the Console shows 【WebAssembly support detected: yes】，without error or alarm。
If this file loaded sucessfuly，the subitles shows immediately。

I 【save as】the loaded file【subtitles-octopus-worker.wasm】，and it's 21.7M。But the file in 【\JavascriptSubtitlesOctopus-master\dist\js】only 1.83M。
I compared my 21.7M file【subtitles-octopus-worker.wasm】，with yours in Demo 【Toaru Kagaku no Railgun S (Spring 2013) Karaoke Test】。They are same。

Why the file size different，and i can‘t load it sucessfull？
If the file always the same one，can i save the 21.7M file in cache? Or put it somewhere in my service？

Can you help me with those questions？