diff --git a/packages/esm-commons-lib/src/utils/schema-manipulation.ts b/packages/esm-commons-lib/src/utils/schema-manipulation.ts
index 32d2f2a71..a1c7f07be 100644
--- a/packages/esm-commons-lib/src/utils/schema-manipulation.ts
+++ b/packages/esm-commons-lib/src/utils/schema-manipulation.ts
@@ -1,7 +1,10 @@
 export function extractSchemaValues(schema) {
   const result = {};
   function traverse(obj) {
-    Object.entries(obj).forEach(([key, value]) => {
+    if (obj === null || obj === undefined || typeof obj !== 'object') {
+      return;
+    }
+    Object.entries(obj)?.forEach(([key, value]) => {
       if (value !== undefined && value !== null) {
         if (typeof value === 'object' && !Array.isArray(value)) {
           traverse(value);