CSS is not loading in domain, but loads in /localhost. Maybe CSS bundles or minification problem?

Help someone, please!?

How did Optimising Bundling get disabled - did you upgrade an old website and copy this file in ?

Have you tried running with Optimising Bundling enabled
That is the default setting
    "EnableJavaScriptBundling": true,
    "EnableCssBundling": true,

Yidna wrote:

Tried this also. It doesn't work. Still the same problem.

Any other ideas, please?

Maybe it's a CSP (Content Security Policy) issue.  
Open the browser's developer tools (F12) and go to Console tab.  Now load the page in browser.  Any errors in console?

New York wrote:

I have these errors:


How to fix this?

And this is how it looks from /localhost/

ERR_CONNECTION_REFUSED
https://www.siteground.com/kb/err_connection_refused/
https://kinsta.com/blog/err_connection_refused/