There is a typo in the btrfs-progs file name of version 9.x.

It remains as brtfs-progs instead of btrfs-progs, and only 9.x maintains a graphical window, making it difficult to check the detailed list like other versions.
It seems that the typo needs to be corrected.
Is it difficult to switch the list screen like other versions?
Because of the typo, both of the following commands do not work.

tce-load -wi btrfs-progs
tce-load -wi brtfs-progs
There is a reason why version 9.x using kernel 4 is absolutely necessary.
The syno data partition using Synology btrfs is made a bit specially,
and I must use kernel 4, which is similar to Synology's kernel 4.4.x, to avoid mount failure.
This is consistent with the reason why Synology requires Ubuntu 18.04 with kernel 4.
Please review my request.