Hi @Marc Stridgen we may be getting crossed messages as there is a parallel request with my server tech support.
They now say they have enabled Redis - "I have enabled the cache extensions on the server end." so perhaps that was causing the error messages and now it is working the errors have gone.
I have now enabled Redis and uploaded the latest constants.php and all seems fine. If the error msg comes back I shall let you know.
Sorry, if this was a false alarm caused by my server tech support not enabling the Redis component!