Sorry, but with this information it would be just a guess: https://www.hyperbola.info/groups/i686/base/
base is an existing group and therefore to be found within the repositories. And bash-shcompat (https://www.hyperbola.info/packages/cor … -shcompat/) is part of the ISO-image, so it is surely installed. Have you made the control having an online-connection?
core is up to date
extra is up to date
Is slightly showing that pacstrap as command is not going the normal way as it should get information from a mirror. If you are installing in the way before with the ISO-image from disk, again the recommendation: Please use a disk connected to your computer through USB or any optical medium created (likewise DVD) at best.
Have you checked your /etc/pacman.conf and /etc/pacman.d/mirrorlist?
Human being in favor with clear principles and so also for freedom in soft- and hardware!
Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!