Problem in deleting site. Contact Support

Hi I am working with a website, I want to delete the site but it seems that I can't do it, I got an error like this "

Problem in deleting site. Contact Support".

I don't know what's the reason, by the way I am a web developer and I was task to check zoho site, and I would make a recommendation if it works well. My boss is pretty fan with zoho, he is planning to migrate all his business processes to zoho, from crm to sites. I added a cdn bootstrap in the header settings, but I deleted it right away(I guess that was the reason for error). But still I can't delete the site, I can't delete and publish. I am in the experiment mode, so I guess its not against your policy. By the way the two site are yet publish, because I also got an error.