fix of #596

Author: AJIXuMuK

src/controls/filePicker/FilePicker.tsx

@@ -55,7 +55,7 @@ export class FilePicker extends React.Component<IFilePickerProps, IFilePickerSta
   public async componentDidMount() {
     // Load information about Organisation Assets Library
     let orgAssetsEnabled: boolean = false;
-    if (this.props.hideOrganisationalAssetTab !== undefined && !this.props.hideOrganisationalAssetTab) {
+    if (!this.props.hideOrganisationalAssetTab) {
       const orgAssetsLibraries = await this.orgAssetsService.getSiteMediaLibraries();
       orgAssetsEnabled = orgAssetsLibraries ? true : false;
     }

src/services/FileBrowserService.ts

@@ -268,7 +268,7 @@ export class FileBrowserService {
    */
   protected buildAbsoluteUrl = (relativeUrl: string) => {
     const siteUrl: string = GeneralHelper.getAbsoluteDomainUrl(this.context.pageContext.web.absoluteUrl);
-    return siteUrl + relativeUrl;
+    return `${siteUrl}${relativeUrl.indexOf('/') === 0 ? '' : '/'}${relativeUrl}`;
   }
 
   protected processResponse = (fileResponse: any): void => {

src/services/OrgAssetsService.ts

@@ -73,7 +73,7 @@ export class OrgAssetsService extends FileBrowserService {
       absoluteUrl: this.buildAbsoluteUrl(libItem.LibraryUrl.DecodedUrl),
       title: libItem.DisplayName,
       serverRelativeUrl: libItem.LibraryUrl.DecodedUrl,
-      iconPath: libItem.ThumbnailUrl.DecodedUrl ? this.buildAbsoluteUrl(`${this._orgAssetsLibraryServerRelativeSiteUrl}/${libItem.ThumbnailUrl.DecodedUrl}`) : null
+      iconPath: libItem.ThumbnailUrl && libItem.ThumbnailUrl.DecodedUrl ? this.buildAbsoluteUrl(`${this._orgAssetsLibraryServerRelativeSiteUrl}/${libItem.ThumbnailUrl.DecodedUrl}`) : null
     };
 
     return orgAssetsLibrary;