Injects a plugin directory into The Events Calendar Template Location checks

override-the-events-calendar-template-location.php

<?php
//Inject Events Calendar template controls in this plugin
add_filter('tribe_events_template', function($file, $template){
  $override_template = TKGEM_ROOT_DIR.'tribe-events/'.$template;
  $theme_template = trailingslashit(get_stylesheet_directory()).'tribe-events/'.$template;
  if(file_exists($override_template) && !file_exists($theme_template)){
    $file = TKGEM_ROOT_DIR.'tribe-events/single-event.php';
  }

  return $file;
}, 10, 2);