Hello again. It has taken this long to resolve the problem. We reinstalled EntryWizard but that did not fix it. Finally, our webhost did some serious investigation and discovered that something they had installed was preventing a large zip file from successfully being created. We are all good now, thanks!
Oh, yes, I’m sorry. It was the EntryWizard update. I was not sure where to find the version number and picked the wrong one! Thank you for responding so quickly.
I was using FireFox 59.0.3 and Chrome (V?) on Windows 10 Pro (Version 1709, OS Build 16299.431).
This error also occurred for the Competition Steward of our club and he contacted me to check.