Fix traceback not being shown on general exceptions

etiquette_site.py

@@ -4,6 +4,7 @@ import json
 import mimetypes
 import os
 import random
+import traceback
 import urllib.parse
 import warnings
 import zipstream
@@ -91,6 +92,7 @@ def P_wrapper(function):
                 flask.abort(response)
 
         except Exception as e:
+            traceback.print_exc()
             if response_type == 'html':
                 flask.abort(500)
             else: