Before ask, it's better to check ALL informations you've set : I copy tuto in a text editor and I write informations then I copy and paste, so no errors !
Please, due Centos 7 is quite obsolete, consider Debian (12) : IMHO it is best distribution for building most server. With distributions based on rpm, it's difficult to find which rpm package to add, and with Debian it's more simple (apt update, apt search, apt install, apt upgrade).