This could be due to heavy traffic on the region you are accessing LINUX VMs because of IT industry is WFH because of COVID-19 impact. I understand that it is very surprising/annoying that it was working last week and not working at this point of time.
Have some patience, our team was also facing similar issues with Mumbai Region this week, hence I suggest to try using different way for connecting apart from current one you have using since last week.
Hope this helps!