Breville Oracle lost extraction pressure overnight

[Holly123]

Hi everyone have had a Breville Oracle for about 2 years and it has been great until today. It all of a sudden lost pressure when extracting and no matter what I do I can't fix it.... fine grind to the max number 1...same result watery coffee extract... and highest tamp get zero results no matter what I do it always comes out runny and seems no pressure is building up during extraction... any suggestions would be great.
Cheers.

 

[coughee1]

Any scale build up inside? Have a look inside and see if it just needs a decent clean, like a real decent clean.