Command which failed was: "  yum -y install screen xvfb libxcursor1 ca-certificates bzip2 psmisc libglib2.0-0 less cron-apt ntp python iproute which dbus libnss3 libegl1-mesa x11-xkb-utils libasound2 libxcomposite-dev libxi6 libpci3 libxslt1.1 libxkbcommon0 libxss1". Please try to execute it manually and attach the output to the bug report in the forum thread.
If it still doesn't work report this to the author at https://forum.sinusbot.com/threads/sinusbot-installer-script.1200/ only. Not a PN or a bad review, cause this is an error of your system not of the installer script. Line 622.