diff --git a/landingPages/landing-utils/parsingFunctions.class.ts b/landingPages/landing-utils/parsingFunctions.class.ts
index 26c1f9d0..00e90aa8 100644
--- a/landingPages/landing-utils/parsingFunctions.class.ts
+++ b/landingPages/landing-utils/parsingFunctions.class.ts
@@ -665,6 +665,9 @@ export class ParsingFunctions {
     }
 
     if(properties.environment != "production" && classifiedSubjects != null) {
+      if (subjects == undefined) {
+        subjects = new Array<string>();
+      }
       for (let classified of classifiedSubjects.keys()) {
         subjects = subjects.concat(classifiedSubjects.get(classified));
       }