Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class "Automattic\Jetpack\PaypalPayments\PayPal_Payment_Buttons" not found in /srv/users/atlassian/apps/atlassianstaging/public/wp-includes/class-wp-hook.php:341 Stack trace: #0 /srv/users/atlassian/apps/atlassianstaging/public/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array) #1 /srv/users/atlassian/apps/atlassianstaging/public/wp-includes/plugin.php(522): WP_Hook->do_action(Array) #2 /srv/users/atlassian/apps/atlassianstaging/public/wp-settings.php(742): do_action('init') #3 /srv/users/atlassian/apps/atlassianstaging/public/wp-config.php(106): require_once('/srv/users/atla...') #4 /srv/users/atlassian/apps/atlassianstaging/public/wp-load.php(50): require_once('/srv/users/atla...') #5 /srv/users/atlassian/apps/atlassianstaging/public/wp-blog-header.php(13): require_once('/srv/users/atla...') #6 /srv/users/atlassian/apps/atlassianstaging/public/index.php(17): require('/srv/users/atla...') #7 {main} thrown in /srv/users/atlassian/apps/atlassianstaging/public/wp-includes/class-wp-hook.php on line 341