If you installed Amelia, but each time it's activated it causes a critical error, there's a conflict with some other plugin or the theme you have installed.

Try deactivating all other plugins, and then activate only Amelia. If it works fine, start activating other plugins one by one, and see when the issue occurs. Once it happens again, you will have found the conflicting plugin.

Please note: The following instructions should be performed only if you know what you're familiar with modifying PHP files. If you are not certain about the procedure, please reach out to our support team by opening a new ticket here.

The conflicting plugin's slug needs to be added to the "functions.php" file located in the "mu-plugins" folder (../wp-content/plugins/mu-plugins). If you don't have this folder, please create it, and if you don't have the "functions.php" file, you can create it. Add the code below, but please make sure to change the slug "the-slug-of-the-conflicting-plugin", so it matches the actual slug of the plugin (to find the slug, you can simply take a look at the folder name of that plugin in ../wp-content/plugins/ folder):

<?php
function wpamelia_exclude_plugins($plugins) {
  if (!defined('DOING_AJAX') || !DOING_AJAX || !isset($_GET['action']) || false === strpos($_GET['action'], 'wpamelia_api')) {
    return $plugins;
  }
  foreach($plugins as $key => $plugin) {
    if (false !== strpos($plugin, 'the-slug-of-the-conflicting-plugin')) {
      unset($plugins[$key]);
    }
  }
  return $plugins;
}
add_filter('option_active_plugins', 'wpamelia_exclude_plugins');

If this doesn't help, please let us know.