diff --git a/packages/core/scripts/serverless-orchestration/ServerlessHub.js b/packages/core/scripts/serverless-orchestration/ServerlessHub.js
index d2e4d08eb2..31aec243f3 100644
--- a/packages/core/scripts/serverless-orchestration/ServerlessHub.js
+++ b/packages/core/scripts/serverless-orchestration/ServerlessHub.js
@@ -61,7 +61,9 @@ hub.post("/", async (req, res) => {
     const lastQueriedBlockNumber = await _getLastQueriedBlockNumber(req.body.configFile);
     if (!configObject || !lastQueriedBlockNumber)
       throw new Error(
-        `Serverless hub requires a config object and a last updated block number! configObject:${configObject} lastQueriedBlockNumber:${lastQueriedBlockNumber}`
+        `Serverless hub requires a config object and a last updated block number! configObject:${JSON.stringify(
+          configObject
+        )} lastQueriedBlockNumber:${lastQueriedBlockNumber}`
       );
 
     // Get the latest block number. The query will run from the last queried block number to the latest block number.