Hello, I found an error in the MDBUploaderService class for the mdbFileSelect component and what was happening was that when adding the files of type UploadInput ('uploadFile') it did nothing and this was because the Observable was added after launching the Subscriber Then I got it to work correctly.

I changed this 'mdb-uploader.class.ts: 115':

case 'uploadFile':
 this.serviceEvents.emit({type: 'start', file: event.file});
 const sub = this.uploadFile(event.file, event).subscribe((data: any) => {
 this.serviceEvents.emit(data);
 });
 this.uploads.push({file: event.file, sub: sub});
 break;

For this 'mdb-uploader.class.ts: 115':

case 'uploadFile':
 this.serviceEvents.emit({type: 'start', file: event.file});
 const sub = this.uploadFile(event.file, event);
 this.uploads.push({file: event.file, sub: sub});
 sub.subscribe((data: any) => {
  this.serviceEvents.emit(data);
 });
 break;

Greetings.