diff --git a/src/stores/edge-addon-store.ts b/src/stores/edge-addon-store.ts
index 3534f5c..0261f3f 100644
--- a/src/stores/edge-addon-store.ts
+++ b/src/stores/edge-addon-store.ts
@@ -78,7 +78,7 @@ export class EdgeAddonStore implements IStore {
     } while (operation.status === 'InProgress');
 
     if (operation.status === 'Failed') {
-      throw Error(`Validation failed: ${operation.message}`);
+      throw Error(`Validation failed: ${JSON.stringify(null, 2, operation)}`);
     } else {
       this.log('Extension is valid: ' + operation.message);
     }