@MrDJ Yes those error messages have been frequent during the last few days, including this morning in UK. Same has been seen on different browsers and different devices.
I am in now but wonder how long this session lasts. Yesterday I could hardly finish typing a reply before getting one of those error messages, and flushing dns had no effect.
It would be good if Avast staff member would at least acknowledge the issue, even if they don't wish to give out the reason or cause.