plain CSS text after successful login

General
1

I use Backery App for an Exercise App, is work well but after successful login is come every time a different plain CSS text like this:

Browser Link: http://localhost:8080/styles/views/view-frame.css

After deleting styles/views/view-frame.css from link than work fine.

Any idea?

.view-frame {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  overflow: hidden;
}

.view-frame__header {
  z-index: 2;
}

.view-frame__wrapper {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.view-frame__content {
  flex: 1;
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
  -webkit-overflow-scrolling: touch;
}

.view-frame__footer {
  z-index: 2;
}
2

The solution was to add to SecurityConfiguration following:

“/styles/”,
“/bower_components/”,
“/css/”,

@Override
public void configure(WebSecurity web) throws Exception {
	web.ignoring().antMatchers(
			// Vaadin Flow static resources
			"/build/**",
			"/VAADIN/**",

			// the standard favicon URI
			"/favicon.ico",

			// the robots exclusion standard
			"/robots.txt",

			// web application manifest
			"/manifest.webmanifest",
			"/sw.js",
			"/offline-page.html",

			// icons and images
			"/icons/**",

			"/images/**",

			// (development mode) static resources
			"/frontend/**",

			// (development mode) webjars
			"/webjars/**",

			// 
			"/styles/**",

			// 
			"/bower_components/**",
			
			// 
			"/css/**"