Failed to load module script

One possible explanation for the error:
You get this behavior when you deploy your app into a subfolder, not directly on your base-URL.The HTML is found when you go to www.yourbase.com/yoursubfolder/index.html, but as the angular app fetches other resources from www.yourbase.com/resource.css instead of from www.yourbase.com/yoursubfolder/resource.css and your webserver probably serves some default page (maybe your www.yourbase.com/index.html) the content of your CSS becomes the content of that HTML page. That would explain the error.

To fix it build your angular app with:

ng build --prod --base-href yoursubfolder

I had the same error. The culprit was in my express server.js file.

app.use(express.static(__dirname + '/dist/<app-folder-name>'));// PathLocationStrategyapp.get('/*', function(req, res) {    res.sendFile(path.join(__dirname + '/dist/<app-folder-name>/index.html'));})

If you don't include your app-folder-name after the dist folder for the express.static method it will result in the MIME type error since it can't locate your Javascript bundles.

I got the same error when I try to deploy angular UI in a subfolder of nginx.

Finally, I fixed it. Wish it helpful.

Let's say if you want to host your website https://www.yourdomain.com/sub1/

Step 1: use --base-href to build

ng build --base-href=/sub1/

Step 2: config in nginx

There are 2 ways to host your subfolder.

Assuming that your dist folder locates in html/sub1dist

1)Host local dist as subfolder

server {    listen       80;    server_name  localhost;    location /sub1 {        alias   html/sub1dist;        try_files $uri $uri/ /index.html =404;    }}

2)Proxy pass another endpoint as subfolder

server {    listen       80;    server_name  localhost;    location /sub1/ {        # rewrite to remove the subfolder        rewrite ^/sub1/(.*)$ /$1 break;        proxy_pass http://127.0.0.1:8071;    }}server {    listen       8071;    server_name  localhost;    location / {        root   html/sub1dist;        try_files $uri $uri/ /index.html =404;    }}

Each of above solutions works fine for me.