index.php?action=login2 Session Error

[Dominus Arbitrationis]

EDIT: Searching via the forums didn't show any results. Manually reading through the forums, however, did provide a functional fix.

If someone updated to 2.0.14, they need to add <input type="hidden" name="', $context['session_var'], '" value="', $context['session_id'], '" />
to their forms. (I didn't figure this out. Credit goes to vbgamer45 (https://www.simplemachines.org/community/index.php?topic=554249.msg3928635#msg3928635))