Alright, I managed to get rid of the first error by Chmod the plugin folder via web ftp of my host. However, the second error is still there and stops me from activating everything on the setting/display page.
Fatal error: Call to undefined function bbp_get_dynamic_roles() in /wp-content/plugins/bbp-user-ranking/includes/display.php on line 353
Wordpress is also now up to date. Am I missing something, or could another plugin cause this?