'Spring Boot, some asset files in public/static folder cannot be found in browser resulting in 404

I am running into a strange issue in my Spring Boot Maven project.

Into the /public/assets/ folder, all resources can be found in the browser except some css or js files generating a 404 HTTP error
Everything is set in my config file, specially WebSecurityConfigurerAdapter is extended.
Because I am using Spring Security dependency, here is a portion of code that handles assets files

@Override
public void configure(WebSecurity web) throws Exception {
    web
        .ignoring()
        .antMatchers("/assets/**", "/files/**");
}

Therefore, in the image below, highlighted files are not loaded.
enter image description here

Note that this strange behavior only happened today, everything was working as expected the last time I ran the project.

Any idea what I mess or did ?

javaspring-boot


Solution 1:[1]

Found out that some logical errors may impact page generation without any stacktrace.

In my case, I added a JPA Repository extending CrudRepository. I had no errors in the application execution but for some reason my frontend was impacted. As soon as I removed the repository in question everything went back to normal.

WEIRD !

Sources

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Source: Stack Overflow

Solution Source
Solution 1 dm_tr

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