Xibo 3.0.0 installation error

I’m not able to do the custom installation of version 3.0.0.


already use version 2.3.10 with more unsuccessful base of other error

"The CMS is temporarily offline due to an update in progress. Check your system administrator for updates or refresh the page in a few minutes."

I did all the preparation with this writing


I use a vps server “CENTOS 7.9”
could someone help me