CiviMail tracked URLs give "Missing input parameters" from /extern/url.php
It seems your host configuration is the problem, as it forces redirection from https to http and somehow lost the parameters in the convertion

Can you try to access the https version with the parameters?

https://mysite.org/sites/all/modules/civicrm/extern/url.php?u=193&amp;qid=52

In any case, if you want to use https, be sure your configuration is set with https (CIVICRM_UF_BASEURL in your civicrm.settings.php), so it directly creates the right url and avoid a redirect