Not possible to add collection list on collection page

CMS Basic plan:

i have added 5 collection list in my collection page. One of them was named “products” - not selling anything or similar. Suddenly i can not bind any more collection list to my page - i should be up to 20 collection list as far as i know. I can duplicate already added collection list but not add a new one (such es multi image, etc.).

It shows the usual dialog box when i add a collection list but when i select any collection nothing happens. no error message, no nothing.

I thought it was because one of my collection was named “products” so the systems wants me to upgrad to the ecommerce plan - so i even deleted this refernced collection list… but nothing still same problem.

i can add on other collection pages multiple collection list - just on this single one not anymore…?

Support is not coming back - i am paying customer i am pretty disapointed and do not know what to do


Here is my public share link: LINK
(how to access public share link)