Composer error when trying to install in Bolt 3.1.5

[mtnorthrop]

I'm not able to install this on a fresh install of Bolt 3.1.5.

When I try to install it through the Bolt Extend page by selecting version v0.11.0 and clicking "Install this version", I'm shown a Composer error that reads "Could not find package bobdenotter/seo at any version for your minimum-stability (stable). Check the package spelling or your minimum-stability".

Is this a bug, or have I configured something incorrectly?

Thanks!