Warning: Undefined variable $query in /customers/1/8/f/microbirding.se/httpd.www/app/models/lista_model.php on line 223

Fatal error: Uncaught ValueError: PDO::prepare(): Argument #1 ($query) cannot be empty in /customers/1/8/f/microbirding.se/httpd.www/app/models/lista_model.php:223
Stack trace:
#0 /customers/1/8/f/microbirding.se/httpd.www/app/models/lista_model.php(223): PDO->prepare('')
#1 /customers/1/8/f/microbirding.se/httpd.www/app/core/lista.php(79): Lista_model->month('11')
#2 /customers/1/8/f/microbirding.se/httpd.www/app/core/App.php(46): lista->month('11')
#3 /customers/1/8/f/microbirding.se/httpd.www/index.php(4): App->__construct()
#4 {main}
  thrown in /customers/1/8/f/microbirding.se/httpd.www/app/models/lista_model.php on line 223