it is caused by this code in kdump https://github.com/yast/yast-kdump/blob/master/src/modules/Kdump.rb#L420 It is specific code for transactional systems. Sadly I see nothing in error output what is wrong as the code should created kdump specific initrd. But that missing loader type is very strange as it should be written very early after partitioning and before rpm install by this client https://github.com/yast/yast-bootloader/blob/master/src/clients/inst_bootloader.rb#L45