Domain settings not working

Domain settings not working

Hi,

On Zoho Sites, I would like to change my primary domain and delete some old domains I do not own anymore but it did not work
When I click on "make primary," nothing happens
When I click on the red cross to delete the domain, the pop up appears and I click on "ok", the pop up disappear but nothing happens

I tried to contact support but that did not work either
Even if I click on the "send" button nothing happens

Is there a bug?
What could I do?
Thanks!

Have a nice day,
Fanny