diff --git a/Procfile b/Procfile
index 16e3a033..8ae78557 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1 @@
-web: node ./backend/index.js --Client-authenticationRequired=false
+web: node ./backend/index.js --Client-authenticationRequired=false --Client-Sharing-enabled=false
diff --git a/backend/middlewares/AdminMWs.ts b/backend/middlewares/AdminMWs.ts
index 0c5fc393..4f8b608f 100644
--- a/backend/middlewares/AdminMWs.ts
+++ b/backend/middlewares/AdminMWs.ts
@@ -136,6 +136,9 @@ export class AdminMWs {
       // only updating explicitly set config (not saving config set by the diagnostics)
       const original = Config.original();
       original.Client.authenticationRequired = <boolean>req.body.settings;
+      if (original.Client.authenticationRequired === false) {
+        original.Client.Sharing.enabled = false;
+      }
       original.save();
       await ConfigDiagnostics.runDiagnostics();
       Logger.info(LOG_TAG, 'new config:');
diff --git a/backend/model/ConfigDiagnostics.ts b/backend/model/ConfigDiagnostics.ts
index 925d61d0..1099605b 100644
--- a/backend/model/ConfigDiagnostics.ts
+++ b/backend/model/ConfigDiagnostics.ts
@@ -104,6 +104,10 @@ export class ConfigDiagnostics {
       config.Server.database.type === DatabaseType.memory) {
       throw new Error('Memory Database do not support sharing');
     }
+    if (sharing.enabled === true &&
+      config.Client.authenticationRequired === false) {
+      throw new Error('In case of no authentication, sharing is not supported');
+    }
   }
 
   static async testMapConfig(map: ClientConfig.MapConfig) {
@@ -118,10 +122,11 @@ export class ConfigDiagnostics {
     if (Config.Server.database.type !== DatabaseType.memory) {
       try {
         await ConfigDiagnostics.testDatabase(Config.Server.database);
-      } catch (err) {
-        Logger.warn(LOG_TAG, '[SQL error]', err);
+      } catch (ex) {
+        const err: Error = ex;
+        Logger.warn(LOG_TAG, '[SQL error]', err.toString());
         Logger.warn(LOG_TAG, 'Error during initializing SQL falling back temporally to memory DB');
-        NotificationManager.warning('Error during initializing SQL falling back temporally to memory DB', err);
+        NotificationManager.warning('Error during initializing SQL falling back temporally to memory DB', err.toString());
         Config.setDatabaseType(DatabaseType.memory);
       }
     }
@@ -129,11 +134,12 @@ export class ConfigDiagnostics {
     if (Config.Server.thumbnail.processingLibrary !== ThumbnailProcessingLib.Jimp) {
       try {
         await ConfigDiagnostics.testThumbnailLib(Config.Server.thumbnail.processingLibrary);
-      } catch (err) {
+      } catch (ex) {
+        const err: Error = ex;
         NotificationManager.warning('Thumbnail hardware acceleration is not possible.' +
           ' \'' + ThumbnailProcessingLib[Config.Server.thumbnail.processingLibrary] + '\' node module is not found.' +
-          ' Falling back temporally to JS based thumbnail generation', err);
-        Logger.warn(LOG_TAG, '[Thumbnail hardware acceleration] module error: ', err);
+          ' Falling back temporally to JS based thumbnail generation', err.toString());
+        Logger.warn(LOG_TAG, '[Thumbnail hardware acceleration] module error: ', err.toString());
         Logger.warn(LOG_TAG, 'Thumbnail hardware acceleration is not possible.' +
           ' \'' + ThumbnailProcessingLib[Config.Server.thumbnail.processingLibrary] + '\' node module is not found.' +
           ' Falling back temporally to JS based thumbnail generation');
@@ -143,51 +149,57 @@ export class ConfigDiagnostics {
 
     try {
       await ConfigDiagnostics.testThumbnailFolder(Config.Server.thumbnail.folder);
-    } catch (err) {
-      NotificationManager.error('Thumbnail folder error', err);
-      Logger.error(LOG_TAG, 'Thumbnail folder error', err);
+    } catch (ex) {
+      const err: Error = ex;
+      NotificationManager.error('Thumbnail folder error', err.toString());
+      Logger.error(LOG_TAG, 'Thumbnail folder error', err.toString());
     }
 
 
     try {
       await ConfigDiagnostics.testImageFolder(Config.Server.imagesFolder);
-    } catch (err) {
-      NotificationManager.error('Images folder error', err);
-      Logger.error(LOG_TAG, 'Images folder error', err);
+    } catch (ex) {
+      const err: Error = ex;
+      NotificationManager.error('Images folder error', err.toString());
+      Logger.error(LOG_TAG, 'Images folder error', err.toString());
     }
     try {
       await ConfigDiagnostics.testClientThumbnailConfig(Config.Client.Thumbnail);
-    } catch (err) {
-      NotificationManager.error('Thumbnail settings error', err);
-      Logger.error(LOG_TAG, 'Thumbnail settings error', err);
+    } catch (ex) {
+      const err: Error = ex;
+      NotificationManager.error('Thumbnail settings error', err.toString());
+      Logger.error(LOG_TAG, 'Thumbnail settings error', err.toString());
     }
 
 
     try {
       await ConfigDiagnostics.testSearchConfig(Config.Client.Search, Config);
-    } catch (err) {
+    } catch (ex) {
+      const err: Error = ex;
       NotificationManager.warning('Search is not supported with these settings. Disabling temporally. ' +
-        'Please adjust the config properly.', err);
-      Logger.warn(LOG_TAG, 'Search is not supported with these settings, switching off..', err);
+        'Please adjust the config properly.', err.toString());
+      Logger.warn(LOG_TAG, 'Search is not supported with these settings, switching off..', err.toString());
       Config.Client.Search.enabled = false;
     }
 
     try {
       await ConfigDiagnostics.testSharingConfig(Config.Client.Sharing, Config);
-    } catch (err) {
+    } catch (ex) {
+      const err: Error = ex;
       NotificationManager.warning('Sharing is not supported with these settings. Disabling temporally. ' +
-        'Please adjust the config properly.', err);
-      Logger.warn(LOG_TAG, 'Sharing is not supported with these settings, switching off..', err);
+        'Please adjust the config properly.', err.toString());
+      Logger.warn(LOG_TAG, 'Sharing is not supported with these settings, switching off..', err.toString());
       Config.Client.Sharing.enabled = false;
     }
 
     try {
       await ConfigDiagnostics.testMapConfig(Config.Client.Map);
-    } catch (err) {
+    } catch (ex) {
+      const err: Error = ex;
       NotificationManager.warning('Maps is not supported with these settings. Disabling temporally. ' +
-        'Please adjust the config properly.', err);
+        'Please adjust the config properly.', err.toString());
       Logger.warn(LOG_TAG, 'Maps is not supported with these settings. Disabling temporally. ' +
-        'Please adjust the config properly.', err);
+        'Please adjust the config properly.', err.toString());
       Config.Client.Map.enabled = false;
     }
 
diff --git a/backend/routes/SharingRouter.ts b/backend/routes/SharingRouter.ts
index 8fc5f7a2..05511ea5 100644
--- a/backend/routes/SharingRouter.ts
+++ b/backend/routes/SharingRouter.ts
@@ -2,9 +2,10 @@ import {AuthenticationMWs} from '../middlewares/user/AuthenticationMWs';
 import {UserRoles} from '../../common/entities/UserDTO';
 import {RenderingMWs} from '../middlewares/RenderingMWs';
 import {SharingMWs} from '../middlewares/SharingMWs';
+import * as express from 'express';
 
 export class SharingRouter {
-  public static route(app: any) {
+  public static route(app: express.Express) {
 
     this.addShareLogin(app);
     this.addGetSharing(app);
@@ -12,7 +13,7 @@ export class SharingRouter {
     this.addUpdateSharing(app);
   }
 
-  private static addShareLogin(app) {
+  private static addShareLogin(app: express.Express) {
     app.post('/api/share/login',
       AuthenticationMWs.inverseAuthenticate,
       AuthenticationMWs.shareLogin,
@@ -20,7 +21,7 @@ export class SharingRouter {
     );
   }
 
-  private static addGetSharing(app) {
+  private static addGetSharing(app: express.Express) {
     app.get('/api/share/:sharingKey',
       AuthenticationMWs.authenticate,
       AuthenticationMWs.authorise(UserRoles.LimitedGuest),
@@ -29,7 +30,7 @@ export class SharingRouter {
     );
   }
 
-  private static addCreateSharing(app) {
+  private static addCreateSharing(app: express.Express) {
     app.post(['/api/share/:directory(*)', '/api/share/', '/api/share//'],
       AuthenticationMWs.authenticate,
       AuthenticationMWs.authorise(UserRoles.User),
@@ -38,7 +39,7 @@ export class SharingRouter {
     );
   }
 
-  private static addUpdateSharing(app) {
+  private static addUpdateSharing(app: express.Express) {
     app.put(['/api/share/:directory(*)', '/api/share/', '/api/share//'],
       AuthenticationMWs.authenticate,
       AuthenticationMWs.authorise(UserRoles.User),
diff --git a/backend/server.ts b/backend/server.ts
index 4195ac8c..76aa4a20 100644
--- a/backend/server.ts
+++ b/backend/server.ts
@@ -27,7 +27,7 @@ const LOG_TAG = '[server]';
 
 export class Server {
 
-  private app: any;
+  private app: _express.Express;
   private server: any;
 
   /**
diff --git a/frontend/app/settings/share/share.settings.service.ts b/frontend/app/settings/share/share.settings.service.ts
index c78f5d3f..338c267a 100644
--- a/frontend/app/settings/share/share.settings.service.ts
+++ b/frontend/app/settings/share/share.settings.service.ts
@@ -15,7 +15,8 @@ export class ShareSettingsService extends AbstractSettingsService<ClientConfig.S
 
 
   public isSupported(): boolean {
-    return this._settingsService.settings.value.Server.database.type !== DatabaseType.memory;
+    return this._settingsService.settings.value.Server.database.type !== DatabaseType.memory &&
+      this._settingsService.settings.value.Client.authenticationRequired === true;
   }
 
   public updateSettings(settings: ClientConfig.SharingConfig): Promise<void> {
diff --git a/package.json b/package.json
index c87c3a5a..eda87427 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "winston": "2.4.2"
   },
   "devDependencies": {
-    "@agm/core": "1.0.0-beta.2",
+    "@agm/core": "1.0.0-beta.3",
     "@angular-devkit/build-angular": "~0.6.3",
     "@angular/animations": "6.0.3",
     "@angular/cli": "6.0.3",