I've just gone ahead and reinstalled the plugin (through cPanel's extract). Same issue.
That problem has been reported by the clients in the last 3 days. We've proceeded to ensure every single plugin and the theme are updated.
I find it somewhat strange that *something* is referencing a folder that isn't even present in Types plugin.
Looking in the browser console's Network tab, the error happens right after the loading of icl-admin-notifier.js (WPML) ans submitanyways.js (Types)...