diff --git a/projects/ngx-file-upload/src/lib/file-upload/file-upload.service.ts b/projects/ngx-file-upload/src/lib/file-upload/file-upload.service.ts
index 17f655b..ca7229f 100644
--- a/projects/ngx-file-upload/src/lib/file-upload/file-upload.service.ts
+++ b/projects/ngx-file-upload/src/lib/file-upload/file-upload.service.ts
@@ -76,6 +76,10 @@ export class FileUploadService {
   }
 
   private uploadFileToURL(uploadFileURL: string, file: File): Observable<HttpResponse<void> | HttpUploadProgressEvent> {
+    if (!uploadFileURL) {
+      return throwError(() => new HttpError('Upload URL is invalid', 0));
+    }
+
     const pathname: string = (new URL(uploadFileURL)).pathname;
 
     return this.http.put(
@@ -90,7 +94,7 @@ export class FileUploadService {
           'ngsw-bypass': "true",
           // This Content-Disposition is to force the browser to download file 
           // rather than preview it when the download button is clicked
-        'Content-Disposition': `attachment; filename=${file.name ?? pathname.substring(pathname.lastIndexOf('/') + 1)}`,
+          'Content-Disposition': `attachment; filename=${file.name ?? pathname.substring(pathname.lastIndexOf('/') + 1)}`,
         },
         observe: 'events',
         reportProgress: !this.config.ignoreProgressReports,