ngx-highlightjs: Highlight.js library was not imported and cannot read property 'themePath' of undefined

• bug report
• feature request
• question

Repro steps

1. Install ngx-hightlightjs 6.1.0

2. Add the following to app.module.ts:

import {HighlightModule, HIGHLIGHT_OPTIONS} from 'ngx-highlightjs';

imports: [
    ...
    HighlightModule
  ],
providers: [
    ...
    {
      provide: HIGHLIGHT_OPTIONS,
      useValue: {
        coreLibraryLoader: () => import('highlight.js/lib/core'),
        languages: {
          xml: () => import('highlight.js/lib/languages/xml')
        }
      }
    }
  ],

Console logs

Debug mode :

Environment

• Angular: 13
• ngx-highlightjs: 6.1.0
• Browser(s): Chrome 87.0.4280.141 (Build officiel) (32 bits)
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 10 Professionnel