Having the same issue, tried restarting Installer etc.
If I don't care to retain Windows partitions, can I reformat to hopefully force Solus installation or is there another underlying issue?
I had some residual formats from trying to dual boot Windows/Solus before I gave up. I have formatted those partitions to ext4 and unchecked flags so unsure why the installer keeps hanging. But I am ok with blowing the Windows away to start from scratch
Worked, used Gparted create table, started from scratch