FR24 shows Status as Offline

Hello everyone and sorry for my not perfect English, I'm new to the forum, but I'm a longtime FR24 user. Anyway, I have a DVB-T USB stick to power the data for FR24, it's connected to a 24 hour PC, my subscription is Business. Until a week ago FR24 was working beautifully now the status is in Offline ... what's going on with the FR24 server? Does anyone have a solution?
Thanks for your help.