Can't install software

I want to get homebrew for my Macbook air with macos catalina 10.15.2.

But when I managed to run the installation code the install command line developer tools pops out and says: Can't install the software because it is not currently available from the software update server.

I read that I might have to install a new command line package thing but I can't seem to find a fitting version for my 10.15.2 system. What do I do?