“add new table” button does not show up

Hello,

On multisite, the “add new table” button does not show up as the page on your official site:

https://woobewoo.com/documentation/how-to-add-a-product-table-to-a-page/

here is the screenshot on my test site:
http://prntscr.com/mqc4d1

does it support multisite ?

Or, is there anything I missed please?

Thanks