diff --git a/packages/server/src/lib/auth.ts b/packages/server/src/lib/auth.ts
index c4fa81f86..ff5a0cb77 100644
--- a/packages/server/src/lib/auth.ts
+++ b/packages/server/src/lib/auth.ts
@@ -361,7 +361,7 @@ export const validateRequest = async (request: IncomingMessage) => {
 			});
 
 			if (error) {
-				throw new Error(error.message || "Error verifying API key");
+				throw new Error(error.message?.toString() || "Error verifying API key");
 			}
 			if (!valid || !key) {
 				return {