Fatal error: Uncaught TypeError: call_user_func_array()

[sdoigmm]

After installing wds-headless-core-main.zip version: 2.1.4, there is a fatal error:

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 /Users/Steven/Local Sites/mandoe-local-nextjs/app/public/wp-includes/class-wp-hook.php:308 Stack trace: #0 /Users/Steven/Local Sites/mandoe-local-nextjs/app/public/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array) #1 /Users/Steven/Local Sites/mandoe-local-nextjs/app/public/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /Users/Steven/Local Sites/mandoe-local-nextjs/app/public/wp-admin/plugins.php(194): do_action('activate_wds-he...') #3 {main} thrown in /Users/Steven/Local Sites/mandoe-local-nextjs/app/public/wp-includes/class-wp-hook.php on line 308

nginx
PHP 8.1.9
WP 6.2.2

[sdoigmm]

Solved by switching to PHP 7.4.30.