Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class "\MailerLiteForms\Modules\Form" not found in /var/www/html/wp-includes/class-wp-hook.php:341
Stack trace:
#0 /var/www/html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)
#1 /var/www/html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#2 /var/www/html/wp-settings.php(771): do_action('init')
#3 /var/www/html/wp-config.php(140): require_once('/var/www/html/w...')
#4 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...')
#5 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...')
#6 /var/www/html/index.php(17): require('/var/www/html/w...')
#7 {main}
thrown in /var/www/html/wp-includes/class-wp-hook.php on line 341