ModuleConfig was previously added, it will not be added multiple times

[Gnorro]

Hi

I updated ngx-loadable to version 2.1.1 because Iupdated our app to angular 8.

What we did in our code in previous version (angular 7.2.5 and ngx-loadable version 1.0.10) was:

"lazyModules": [
              "src/app/features/layout-root/footer/footer.module",
...
...
...
            ]

Then in our core.module:

import { lazyloadFilemappings } from 'app/config/lazyload-filemappings';

LoadableModule.forRoot({
      fileMappings: lazyloadFilemappings
    })

where
lazyload-filemappings.ts is:

export const lazyloadFilemappings = {
  'footer': 'src/app/features/layout-root/footer/footer.module#FooterModule',
...
...
...

After updating to v.2.1.1 fileMappings property is no more available. I read that configuration is different.

I think this is the right configuration now:

LoadableModule.forRoot({
      moduleConfigs: [{
        name: 'footer',
        loadChildren: () => import("../features/layout-root/footer/footer.module").then(mod=> mod.FooterModule),
        matcher
      }]
    })

so I used that in core.module

When I run app I get this warning:
ngx-loadable - ModuleConfig with name 'footer' was previously added, it will not be added multiple times, continue...

I get this warning multiple times and it continues to infinite and the app is blocked.

Why this happens?
What's wrong?
I also tried to remove "lazyModules" from angular,json without luck.

If I use only LoadableModule in core.module then I get error:
TypeError: "this.options is null" on this line:
<ngx-loadable [show]="true" [module]="'footer'">

and naturally footer is not loaded

Thanks for your help