diff --git a/runners/katacoda/katacodaAssetManager.ts b/runners/katacoda/katacodaAssetManager.ts
index 868363fd..ac265681 100644
--- a/runners/katacoda/katacodaAssetManager.ts
+++ b/runners/katacoda/katacodaAssetManager.ts
@@ -19,10 +19,12 @@ export class KatacodaAssetManager {
             copyFile: copyFile
         });
 
-        this.katacodaAssets.push({
-            file: filepathTarget.replace(/\\/g, "/"),
-            target: katacodaDirectory.replace(/\\/g, "/")
-        })
+        if(filepathTarget && katacodaDirectory) {
+            this.katacodaAssets.push({
+                file: filepathTarget.replace(/\\/g, "/"),
+                target: katacodaDirectory.replace(/\\/g, "/")
+            })
+        }
     }
 
     registerDirectory(directorySource: string, filepathTarget: string, katacodaDirectory: string, copyFile: boolean) {
diff --git a/runners/katacoda/katacodaTools.ts b/runners/katacoda/katacodaTools.ts
index 543244a0..795a8f0b 100644
--- a/runners/katacoda/katacodaTools.ts
+++ b/runners/katacoda/katacodaTools.ts
@@ -24,7 +24,7 @@ export class KatacodaTools {
             },
             "environment": environment,
             "backend": {
-                "imageid": "ubuntu:1804"
+                "imageid": "ubuntu:2004"
             }
         }
         return indexJsonObject;