diff --git a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts
index 5fed32cd6..a6f7ce512 100644
--- a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts
+++ b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts
@@ -1,26 +1,25 @@
 
 import { COMMA, ENTER } from '@angular/cdk/keycodes';
+import { HttpErrorResponse } from '@angular/common/http';
 import { Component, Inject, OnInit } from '@angular/core';
 import { UntypedFormGroup } from '@angular/forms';
 import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
 import { ActivatedRoute, Router } from '@angular/router';
 import { DmpUserRole } from '@app/core/common/enum/dmp-user-role';
+import { DmpBlueprint } from '@app/core/model/dmp-blueprint/dmp-blueprint';
 import { DmpUserPersist } from '@app/core/model/dmp/dmp';
 import { DmpService } from '@app/core/services/dmp/dmp.service';
 import { SnackBarNotificationLevel, UiNotificationService } from '@app/core/services/notification/ui-notification-service';
-import { UserService } from '@app/core/services/user/user.service';
 import { EnumUtils } from '@app/core/services/utilities/enum-utils.service';
 import { BaseComponent } from '@common/base/base.component';
-import { FilterService } from '@common/modules/text-filter/filter-service';
+import { FormService } from '@common/forms/form-service';
+import { HttpError, HttpErrorHandlingService } from '@common/modules/errors/error-handling/http-error-handling.service';
 import { Guid } from '@common/types/guid';
 import { TranslateService } from '@ngx-translate/core';
-import { DmpEditorModel } from '../../dmp-editor-blueprint/dmp-editor.model';
 import { takeUntil } from 'rxjs/operators';
-import { DmpBlueprint } from '@app/core/model/dmp-blueprint/dmp-blueprint';
-import { HttpErrorHandlingService } from '@common/modules/errors/error-handling/http-error-handling.service';
-import { HttpErrorResponse } from '@angular/common/http';
-import { FormService } from '@common/forms/form-service';
+import { DmpEditorModel } from '../../dmp-editor-blueprint/dmp-editor.model';
 import { DmpEditorService } from '../../dmp-editor-blueprint/dmp-editor.service';
+import { ResponseErrorCode } from '@app/core/common/enum/respone-error-code';
 
 @Component({
 	selector: 'app-invitation-dialog-component',
@@ -34,7 +33,7 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 	editorModel: DmpEditorModel;
 	formGroup: UntypedFormGroup;
 	dmpUserRoleEnum = DmpUserRole;
-	selectedBlueprint: DmpBlueprint; 
+	selectedBlueprint: DmpBlueprint;
 	inProgressSendButton = false;
 	readonly separatorKeysCodes: number[] = [ENTER, COMMA];
 
@@ -59,7 +58,6 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 
 	ngOnInit() {
 		this.formGroup = this.editorModel.buildForm();
-		this.dmpEditorService.setValidationErrorModel(this.editorModel.validationErrorModel);
 	}
 
 	send() {
@@ -70,7 +68,7 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 		this.inProgressSendButton = true;
 		const userFormData = this.formGroup.get("users").value as DmpUserPersist[];
 
-		this.dmpService.inviteUsers(this.dmpId, {users: userFormData})
+		this.dmpService.inviteUsers(this.dmpId, { users: userFormData })
 			.pipe(takeUntil(this._destroyed))
 			.subscribe(
 				complete => {
@@ -93,10 +91,21 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 		this.uiNotificationService.snackBarNotification(this.language.instant('DMP-USER-INVITATION-DIALOG.SUCCESS'), SnackBarNotificationLevel.Success);
 	}
 
+	// onCallbackError(errorResponse: HttpErrorResponse) {
+	// 	this.inProgressSendButton = false;
+	// 	let errorOverrides = new Map<number, string>();
+	// 	errorOverrides.set(-1, this.language.instant('DMP-USER-INVITATION-DIALOG.ERROR'));
+	// 	this.httpErrorHandlingService.handleBackedRequestError(errorResponse, errorOverrides, SnackBarNotificationLevel.Error);
+	// }
+
 	onCallbackError(errorResponse: HttpErrorResponse) {
 		this.inProgressSendButton = false;
-		let errorOverrides = new Map<number, string>();
-		errorOverrides.set(-1, this.language.instant('DMP-USER-INVITATION-DIALOG.ERROR'));
-		this.httpErrorHandlingService.handleBackedRequestError(errorResponse, errorOverrides, SnackBarNotificationLevel.Error);
+		this.httpErrorHandlingService.handleBackedRequestError(errorResponse);
+
+		const error: HttpError = this.httpErrorHandlingService.getError(errorResponse);
+		if (error.statusCode === 400) {
+			this.editorModel.validationErrorModel.fromJSONObject(errorResponse.error);
+			this.formService.validateAllFormFields(this.formGroup);
+		}
 	}
 }