Version 2 of this plugin supports MantisBT version v2
Archived branches compatible with previous MantisBT versions:
Time Tracking 1.0.x, supports MantisBT v1.2 https://github.com/mantisbt-plugins/timetracking/tree/master-1.0
Time Tracking 1.1.x, supports MantisBT v1.3 https://github.com/mantisbt-plugins/timetracking/tree/master-1.1