Resin not sticking to build plate

Hi all, just bought a new Anycubic Photon Mono 4K and a bottle of their grey resin. Admittadly, i was optimistic, going straight with a miniature i got from the web and my own support settings / ChituBox settings, but i let it run overnight as it was an 8 hour job and i woke to find an empty build plate!

I then decided to run the test model from the supplied USB and the same thing has happened...

Does anyone have any suggestions or advice on what i could a have done wrong?

Thanks in advance.