Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class "Automattic\Jetpack\Backup\Package_Version" not found in /htdocs/wp-includes/class-wp-hook.php:310 Stack trace: #0 /htdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #1 /htdocs/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-connection/src/class-package-version-tracker.php(45): apply_filters('jetpack_package...', Array) #2 /htdocs/wp-includes/class-wp-hook.php(310): Automattic\Jetpack\Connection\Package_Version_Tracker->maybe_update_package_versions('') #3 /htdocs/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array) #4 /htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 /htdocs/wp-includes/load.php(1252): do_action('shutdown') #6 [internal function]: shutdown_action_hook() #7 {main} thrown in /htdocs/wp-includes/class-wp-hook.php on line 310