Serviio

I have a 25“ iMac M1 running macOS Tahoe 26.5.2. After the initial installation of Servio, everything works fine. I shut down the computer, and when I open it and Servio, I get this message: ”Cannot Connect to the server, it doesn't seem to be running..."
I’ve looked into it but haven’t found a solution. What should I do? Thanks in advance for your help.
Christian