Cannot edit site at all

The subject says it all. No error messages, no reaction at all when I click on the edit button & no reaction to clicking on any of the other buttons, apart from the dashboard symbol. It was editable up until a few days ago then suddenly, not any more, for no good reason.

Sorry not to be able to offer more here, but it's just stopped working, If there was some sort of message I'd post it here, but there ain't!

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ConcreteOwl replied on at Permalink Reply
Website address?
loscon replied on at Permalink Reply
web address is & it would appear that the title block has vanished too, so dunno what;s going on. I'd only just started building the site too, so does not bode well!