I was a bit puzzled because I couldn't find that reported error in the logs; but I think it's probably this: 2021-09-27 00:07:06 <1> install(3804) [libstorage] SystemCmd.cc(execute):190 SystemCmd Executing: "/usr/sbin/parted --script --machine '/dev/nvme0n1' unit s print" 2021-09-27 00:07:06 <3> install(3804) [libstorage] PartitionableImpl.cc(check_unambiguity):113 found filesystem next to partition table on /dev/nvme0n1 Detected a file system next to a partition table on the device /dev/nvme0n1. The file system will be ignored. Unexpected situation found in the system. Continue despite the error? 2021-09-27 00:07:14 <1> install(3804) [libstorage] SystemCmd.cc(execute):190 SystemCmd Executing: "/sbin/btrfs filesystem show" Label: none uuid: b8a111af-863c-4109-a74a-29463f2e02e6" Total devices 1 FS bytes used 5.19GiB" devid 1 size 476.94GiB used 7.02GiB path /dev/nvme0n1" 2021-09-27 00:07:14 <1> install(3804) [libstorage] CmdBtrfs.cc(parse):127 uuid:b8a111af-863c-4109-a74a-29463f2e02e6 devices:<{ id:1 name:/dev/nvme0n1 }> 2021-09-27 00:07:14 <2> install(3804) [libstorage] BlkDeviceImpl.cc(create_blk_filesystem):674 THROW: wrong number of children, seen '1', expected '0' 2021-09-27 00:07:14 <1> install(3804) [Ruby] callbacks/libstorage_callback.rb(error):85 Probing file system with UUID b8a111af-863c-4109-a74a-29463f2e02e6 failed Unexpected situation found in the system. Click below to see more details (English only). Continue despite the error? Storage probing: # 2021-09-27 00:07:27 -0400 --- - disk: name: "/dev/nvme0n1" size: 500107608 KiB (476.94 GiB) block_size: 0.5 KiB io_size: 0 B min_grain: 1 MiB align_ofs: 0 B partition_table: msdos mbr_gap: 1 MiB partitions: - free: size: 500107608 KiB (476.94 GiB) start: 0 B - disk: name: "/dev/sda" size: 14581 MiB (14.24 GiB) ... (the installation USB stick)