It could also be due to the internet connection but what you have suggested can be tried and hopefully it can solve the problem and as long as the WoF from the email is not more than 48 hours then it can still be claimed, so don't need to worry about WoF
I have had the same error multiple times or also an error, where it says that this spin is not valid when you click on the link. Just keep refreshing the page and clear your cache/cookies and you are good to go.