Fatal error: Uncaught exception 'Symfony\Component\Routing\Exception\InvalidParameterException' with message 'Parameter "flag_id" for route "rmcgirr83_nationalflags_getflags" must match "[^/]++" ("" given) to generate a corresponding URL.' in /home/municipa/public_html/vendor/symfony/routing/Symfony/Component/Routing/Generator/UrlGenerator.php:163 Stack trace: #0 /home/municipa/public_html/vendor/symfony/routing/Symfony/Component/Routing/Generator/UrlGenerator.php(136): Symfony\Component\Routing\Generator\UrlGenerator->doGenerate(Array, Array, Array, Array, Array, 'rmcgirr83_natio...', false, Array) #1 /home/municipa/public_html/phpbb/controller/helper.php(188): Symfony\Component\Routing\Generator\UrlGenerator->generate('rmcgirr83_natio...', Array, false) #2 /home/municipa/public_html/ext/rmcgirr83/nationalflags/event/listener.php(366): phpbb\controller\helper->route('rmcgirr83_natio...', Array) #3 [internal function]: rmcgirr83\nationalflags\event\listener->viewtopic_modify_post_row(Object(phpbb\event\data)) #4 /home/mun in /home/municipa/public_html/vendor/symfony/routing/Symfony/Component/Routing/Generator/UrlGenerator.php on line 163