...

examcloud-core-basic-api-provider/src/main/java/cn/com/qmth/examcloud/core/basic/api/provider/OrgCloudServiceProvider.java

@@ -163,7 +163,10 @@ public class OrgCloudServiceProvider extends ControllerSupport implements OrgClo
 
 		Specification<OrgEntity> specification = (root, query, cb) -> {
 			List<Predicate> predicates = new ArrayList<>();
-			predicates.add(cb.equal(root.get("rootId"), rootOrgId));
+
+			if (null != rootOrgId) {
+				predicates.add(cb.equal(root.get("rootId"), rootOrgId));
+			}
 
 			predicates.add(cb.greaterThanOrEqualTo(root.get("id"), start));