fix: if the response is str then handle it properly

app.py

@@ -600,7 +600,10 @@ def generate(
         #print('stream',response)
 
         if len(ENDPOINT)>0:
-            output += response.generated_text if response.generated_text else ""
+            if isinstance(response, str):
+                output += response if response else ""
+            else:
+                output += response.generated_text if response.generated_text else ""
         else:        
             output += response