Unable to access to collection

I’m having trouble with
Collections

Working in

Wix Studio Editor CMS

Site link
Lim Tze Peng

What I’m trying to do
Updating CMS in his paintings collection

What I’ve tried so far
Clear all cache, do the technical

Extra context

We had a Known Issue earlier today related to CMS - Issues With Saving CMS Changes | Help Center | Wix.com - perhaps related? Is it still happening for you?