Describe the bug
Fatal error: Uncaught TypeError: call_user_func_array(): Argument#1 ($callback) must be a valid callback, function "WDS_Headless_Core\activation_callback" not found or invalid function name in C:\xampp\htdocs\wordpress\wp-includes\class-wp-hook.php:307 Stack trace: #0 C:\xampp\htdocs\wordpress\wp-includes\class-wp-hook.php(331): WP_Hook->apply_filters('', Array)#1 C:\xampp\htdocs\wordpress\wp-includes\plugin.php(476): WP_Hook->do_action(Array)#2 C:\xampp\htdocs\wordpress\wp-admin\plugins.php(194): do_action('activate_wds-he...')#3 {main} thrown in C:\xampp\htdocs\wordpress\wp-includes\class-wp-hook.php on line 307

To Reproduce
Steps to reproduce the behavior:

1. Install plugins via composer
2. Try to activate either of the WDS plugins

Expected behavior
The plugins should activate normally without error

Desktop (please complete the following information):

• OS: Windows 21H2
• Browser Microsoft edge with Chromium
• Version 90