[DURACOM-282] fix issue with submission edit page when providing a not existing workspaceitem

src/app/core/submission/submission-parent-breadcrumb.service.ts

@@ -8,7 +8,10 @@ import {
 
 import { getDSORoute } from '../../app-routing-paths';
 import { Breadcrumb } from '../../breadcrumbs/breadcrumb/breadcrumb.model';
-import { hasValue } from '../../shared/empty.util';
+import {
+  hasValue,
+  isEmpty,
+} from '../../shared/empty.util';
 import { SubmissionService } from '../../submission/submission.service';
 import { BreadcrumbsProviderService } from '../breadcrumbs/breadcrumbsProviderService';
 import { DSOBreadcrumbsService } from '../breadcrumbs/dso-breadcrumbs.service';
@@ -46,6 +49,10 @@ export class SubmissionParentBreadcrumbsService implements BreadcrumbsProviderSe
    * @param submissionObject The {@link SubmissionObject} for which the parent breadcrumb structure needs to be created
    */
   getBreadcrumbs(submissionObject: SubmissionObject): Observable<Breadcrumb[]> {
+    if (isEmpty(submissionObject)) {
+      return observableOf([]);
+    }
+
     return combineLatest([
       (submissionObject.collection as Observable<RemoteData<Collection>>).pipe(
         getFirstCompletedRemoteData(),

src/app/core/submission/submission-rest.service.ts

@@ -13,6 +13,7 @@ import {
   isNotEmpty,
 } from '../../shared/empty.util';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { ErrorResponse } from '../cache/response.models';
 import { RemoteData } from '../data/remote-data';
 import {
   DeleteRequest,
@@ -23,6 +24,7 @@ import {
   SubmissionRequest,
 } from '../data/request.models';
 import { RequestService } from '../data/request.service';
+import { RequestError } from '../data/request-error.model';
 import { RestRequest } from '../data/rest-request.model';
 import { HttpOptions } from '../dspace-rest/dspace-rest.service';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
@@ -57,7 +59,7 @@ export class SubmissionRestService {
       getFirstCompletedRemoteData(),
       map((response: RemoteData<SubmissionResponse>) => {
         if (response.hasFailed) {
-          throw new Error(response.errorMessage);
+          throw new ErrorResponse({ statusText: response.errorMessage, statusCode: response.statusCode } as RequestError);
         } else {
           return hasValue(response.payload) ? response.payload.dataDefinition : response.payload;
         }