Exception detected!

An exception has been thrown during the rendering of a template ("Parameter "letter" for route "keyword_list" must match "([A-Z]|-){0,1}" ("2" given).") in WujiLibraryBundle:Keyword:show.html.twig at line 8.

500 Internal Server Error - Twig_Error_Runtime
1 linked Exception:
  • InvalidParameterException »

[2/2] Twig_Error_Runtime: An exception has been thrown during the rendering of a template ("Parameter "letter" for route "keyword_list" must match "([A-Z]|-){0,1}" ("2" given).") in WujiLibraryBundle:Keyword:show.html.twig at line 8.  +

[1/2] InvalidParameterException: Parameter "letter" for route "keyword_list" must match "([A-Z]|-){0,1}" ("2" given).  +

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