Thanks.
We have loaded this version of super-cache and the error messages no longer appear:)
However!! For absolute clarirty these messages were:
Fetching https://www.viseum.co.uk/ to prime cache: OK
Fetching first copy of https://www.viseum.co.uk/: OK
Fetching second copy of https://www.viseum.co.uk/: OK
One or more page requests failed:
? Page 1: 0 ()
? Page 2: 0 ()
The pages do not match! Timestamps differ or were not found!
So, with the development version of wp-super-cache these errors are no longer reported but the symptom still persists ie the when visiting the website for the first time,it seems like the server was asleep and needs waking up before pages start to load quickly!
Therefore could the orgigonal reported problem still be to blame? ie “One or more page requests failed”