KrzysztofMaciejewski
I just found out that litespeed's centos8 yum source has not yet released version 20, only version 20 of centos7 has been released. You may need to wait for it to update before it is released.
yum source
http://rpms.litespeedtech.com/centos/8/x86_64/RPMS/
Please modify your ssh login information in time