PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class GFRemove does not have a method "display_changelog" in /wp-includes/class-wp-hook.php:308
Stack trace:
#0 /wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#1 /wp-includes/plugin.php(517): WP_Hook->do_action()
#2 /wp-admin/plugin-install.php(82): do_action()
#3 {main}
thrown in /wp-includes/class-wp-hook.php on line 308