Unexpected non-MediaWiki exception encountered, of type "TypeError"
<pre>object(TypeError)#32 (7) {
  ["message":protected]=>
  string(75) "count(): Argument #1 ($value) must be of type Countable|array, string given"
  ["string":"Error":private]=>
  string(0) ""
  ["code":protected]=>
  int(0)
  ["file":protected]=>
  string(58) "/var/www/wiki.oilimperium.de/includes/api/ApiQueryBase.php"
  ["line":protected]=>
  int(188)
  ["trace":"Error":private]=>
  array(7) {
    [0]=>
    array(5) {
      ["file"]=>
      string(67) "/var/www/wiki.oilimperium.de/includes/api/ApiQueryLangBacklinks.php"
      ["line"]=>
      int(87)
      ["function"]=>
      string(11) "addWhereFld"
      ["class"]=>
      string(12) "ApiQueryBase"
      ["type"]=>
      string(2) "->"
    }
    [1]=>
    array(5) {
      ["file"]=>
      string(67) "/var/www/wiki.oilimperium.de/includes/api/ApiQueryLangBacklinks.php"
      ["line"]=>
      int(39)
      ["function"]=>
      string(3) "run"
      ["class"]=>
      string(21) "ApiQueryLangBacklinks"
      ["type"]=>
      string(2) "->"
    }
    [2]=>
    array(5) {
      ["file"]=>
      string(54) "/var/www/wiki.oilimperium.de/includes/api/ApiQuery.php"
      ["line"]=>
      int(282)
      ["function"]=>
      string(7) "execute"
      ["class"]=>
      string(21) "ApiQueryLangBacklinks"
      ["type"]=>
      string(2) "->"
    }
    [3]=>
    array(5) {
      ["file"]=>
      string(53) "/var/www/wiki.oilimperium.de/includes/api/ApiMain.php"
      ["line"]=>
      int(913)
      ["function"]=>
      string(7) "execute"
      ["class"]=>
      string(8) "ApiQuery"
      ["type"]=>
      string(2) "->"
    }
    [4]=>
    array(5) {
      ["file"]=>
      string(53) "/var/www/wiki.oilimperium.de/includes/api/ApiMain.php"
      ["line"]=>
      int(363)
      ["function"]=>
      string(13) "executeAction"
      ["class"]=>
      string(7) "ApiMain"
      ["type"]=>
      string(2) "->"
    }
    [5]=>
    array(5) {
      ["file"]=>
      string(53) "/var/www/wiki.oilimperium.de/includes/api/ApiMain.php"
      ["line"]=>
      int(334)
      ["function"]=>
      string(30) "executeActionWithErrorHandling"
      ["class"]=>
      string(7) "ApiMain"
      ["type"]=>
      string(2) "->"
    }
    [6]=>
    array(5) {
      ["file"]=>
      string(36) "/var/www/wiki.oilimperium.de/api.php"
      ["line"]=>
      int(85)
      ["function"]=>
      string(7) "execute"
      ["class"]=>
      string(7) "ApiMain"
      ["type"]=>
      string(2) "->"
    }
  }
  ["previous":"Error":private]=>
  NULL
}