In the manual partitioning I am also unable to resize the btrfs partition. However if I launch gparted I can resize the btrfs partition and then in manual partioning create an ext4 partion by selecting something else to resize so I can still get the installation to start and got to the restart now prompt.
In the manual partitioning I am also unable to resize the btrfs partition. However if I launch gparted I can resize the btrfs partition and then in manual partioning create an ext4 partion by selecting something else to resize so I can still get the installation to start and got to the restart now prompt.