Is something wrong with the Schedule Reminder auto renewals for membership? I cannot find "Membership End Date" in list.
Those other 'issues' suggest you need to review your Directories and/or Resource URLs under Admin > System Settings.

IN terms of does Membership End Date get offered as an option after choosing Entity = Membership - yes - and here is screenshot from https://dmaster.demo.civicrm.org/civicrm/admin/scheduleReminders?action=add&amp;reset=1 to show what is happening on a fully functioning site.

Hope the above hints help