Hi @skrabbel
I believe you can disable the plugins by renaming the “wp-content/plugins” folder. This page should give you more idea about it: http://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/.
Also, could you please check the error log on your server? I believe you can ask your hosting to get the log.
Thanks 🙂