Requirements

MyBB	1.8 (tested on 1.8.41)
PHP	7.4 or later (tested on 7.4 and 8.5)
Database	MySQL or MariaDB, with utf8mb4 support
PHP curl extension	Needed to fetch costumes from the 501st Legion. Without it, members’ saved costumes are used.
Custom profile fields	Six, created before configuring the plugin. See Custom profile fields.

The plugin replaces the forum’s Calendar menu link with Events, so your theme’s header needs a Calendar link.