There is a recent rsync update (rsync.x86_64 0:3.1.2-12.el7_9) that “Resolves: #2123815 - rsync error: protocol incompatibility when using rsync-3.1.2-11.el7_9”
There is a recent rsync update (rsync.x86_64 0:3.1.2-12.el7_9) that “Resolves: #2123815 - rsync error: protocol incompatibility when using rsync-3.1.2-11.el7_9”