diff --git a/src/app/superadmin/workspaces/workspaces.component.html b/src/app/superadmin/workspaces/workspaces.component.html
index 05a42a79cdbb5a2be2f5ccbd4c75b59a2e039ebc..2aaf15439c741c971c81efc9a7e0bbf346451b82 100644
--- a/src/app/superadmin/workspaces/workspaces.component.html
+++ b/src/app/superadmin/workspaces/workspaces.component.html
@@ -63,14 +63,12 @@
 
     <mat-table [dataSource]="UserlistDatasource" matSort>
       <ng-container matColumnDef="selectCheckbox">
-        <mat-header-cell *matHeaderCellDef mat-sort-header>RO | RW | MO</mat-header-cell>
+        <mat-header-cell *matHeaderCellDef mat-sort-header>RO | RW</mat-header-cell>
         <mat-cell *matCellDef="let row" fxFlex="100px">
           <mat-checkbox (change)="selectUser(row, 'RO')" [checked]="row.role === 'RO'" matTooltip="RO">
           </mat-checkbox>
           <mat-checkbox (change)="selectUser(row, 'RW')" [checked]="row.role === 'RW'" matTooltip="RW">
           </mat-checkbox>
-          <mat-checkbox (change)="selectUser(row, 'MO')" [checked]="row.role === 'MO'" matTooltip="MO">
-          </mat-checkbox>
         </mat-cell>
       </ng-container>
 
diff --git a/src/app/superadmin/workspaces/workspaces.component.ts b/src/app/superadmin/workspaces/workspaces.component.ts
index 44942c20c89d4ae3c03e2bdd993c9ef8742e4d4b..45b823bb7c93edc25967de73c151ba9c12ca7149 100644
--- a/src/app/superadmin/workspaces/workspaces.component.ts
+++ b/src/app/superadmin/workspaces/workspaces.component.ts
@@ -125,7 +125,7 @@ export class WorkspacesComponent implements OnInit, OnDestroy {
             this.bs.renameWorkspace(selectedRows[0].id,
                 (<FormGroup>result).get('name').value).subscribe(
                   respOk => {
-                    if (respOk) {
+                    if (respOk !== false) {
                       this.snackBar.open('Arbeitsbereich geändert', '', {duration: 1000});
                       this.updateObjectList();
                     } else {
@@ -178,7 +178,7 @@ export class WorkspacesComponent implements OnInit, OnDestroy {
           selectedRows.forEach((r: IdAndName) => workspacesToDelete.push(r.id));
           this.bs.deleteWorkspaces(workspacesToDelete).subscribe(
             respOk => {
-              if (respOk) {
+              if (respOk !== false) {
                 this.snackBar.open('Arbeitsbereich/e gelöscht', '', {duration: 1000});
                 this.updateObjectList();
                 this.dataLoading = false;
@@ -221,7 +221,7 @@ export class WorkspacesComponent implements OnInit, OnDestroy {
       this.dataLoading = true;
       this.bs.setUsersByWorkspace(this.selectedWorkspaceId, this.UserlistDatasource.data).subscribe(
         respOk => {
-          if (respOk) {
+          if (respOk !== false) {
             this.snackBar.open('Zugriffsrechte geändert', '', {duration: 1000});
           } else {
             this.snackBar.open('Konnte Zugriffsrechte nicht ändern', 'Fehler', {duration: 2000});
diff --git a/src/environments/environment.ts b/src/environments/environment.ts
index 2198cb55032f8805b40eaf7776c665917268055b..1c41f17b6d7745b7771dae6e379e6f797772eae9 100644
--- a/src/environments/environment.ts
+++ b/src/environments/environment.ts
@@ -4,9 +4,9 @@
 
 export const environment = {
   production: false,
-  testcenterUrl: 'https://ocba.iqb.hu-berlin.de/api/',
+  // testcenterUrl: 'https://ocba.iqb.hu-berlin.de/api/',
   // testcenterUrl: 'https://www.iqb-testcenter.de/',
-  // testcenterUrl: 'http://localhost/2020/testcenter-iqb-php/',
+  testcenterUrl: 'http://localhost/api/',
   appName: 'IQB-Testcenter',
   appPublisher: 'IQB - Institut zur Qualitätsentwicklung im Bildungswesen',
   appVersion: '0 (dev)'