Merge pull request #6644 from abpframework/mehmet-erim-patch-1

Resolved sending null tenant id header problem

npm/ng-packs/packages/core/src/lib/interceptors/api.interceptor.ts

@@ -42,7 +42,7 @@ export class ApiInterceptor implements HttpInterceptor {
     }
 
     const tenant = this.sessionState.getTenant();
-    if (!existingHeaders?.has('__tenant') && tenant) {
+    if (!existingHeaders?.has('__tenant') && tenant?.id) {
       headers['__tenant'] = tenant.id;
     }