I can't move folders from my PC to FileZilla on the server? How do I update the Minecraft server from 1.16 to 1.20?

Hello! Actually, I plan to update a Survival 1.16.4 Spigot server to 1.20.4 spigot. I have already edited the individual worlds with MCASelector. I keep getting error messages when I try to add new maps. I even tried moving an empty folder, but that doesn't work. I even tried uploading the old maps again using…

Good training and certificates as a system administrator?

My apprenticeship just started. I'm studying to be an IT specialist in systems integration. I'm currently in first-level support, where I'm responsible for hardware. Hardware tickets, for example, a computer monitor that doesn't work. But that's far too easy and boring for me, which is why I want to move into administration. My goal is…