diff --git a/app/services/material.py b/app/services/material.py
index 29f61eb..2dda2b2 100644
--- a/app/services/material.py
+++ b/app/services/material.py
@@ -13,7 +13,7 @@ from app.utils import utils
 requested_count = 0
 pexels_api_keys = config.app.get("pexels_api_keys")
 if not pexels_api_keys:
-    raise ValueError("pexels_api_keys is not set, please set it in the config.toml file.")
+    raise ValueError(f"\n\n##### pexels_api_keys is not set #####\n\nPlease set it in the config.toml file: {config.config_file}\n\n{utils.to_json(config.app)}")
 
 
 def round_robin_api_key():