Link.php: enhance error message for logged in be user on missing token.

extension/qfq/qfq/report/Link.php

@@ -536,7 +536,9 @@ class Link {
             $tokenGiven[$key] = true;
 
             if (!isset($this->tableVarName[$key])) {
-                throw new UserReportException ("Unknown link qualifier: '$key' - did you forget the one character qualifier?", ERROR_UNKNOWN_LINK_QUALIFIER);
+                $msg[ERROR_MESSAGE_TO_USER]="Unknown link qualifier: '$key' - did you forget the one character qualifier?";
+                $msg[ERROR_MESSAGE_SUPPORT]=$str;
+                throw new UserReportException (json_encode($msg), ERROR_UNKNOWN_LINK_QUALIFIER);
             }
 
             $keyName = $this->tableVarName[$key]; // convert token to name