You definitely don't want to download this.

• PHP v7.0+
• CiviCRM 5.19 or greater

You will never be able to install this from the web UI. Just deal with it.

https://github.com/vandahm/tcmaker-keyfobs/releases/

To make your own ZIP file:

git clone https://github.com/vandahm/tcmaker-keyfobs.git
cd tcmaker-keyfobs
composer Install
zip -r keyfobs.zip . -x '.git/*'

Sysadmins and developers may clone the Git repo for this extension and install it with the command-line tool cv.

git clone https://github.com/vandahm/tcmaker-keyfobs.git
cd tcmaker-keyfobs
composer install
cv en keyfobs

Be sure to set your AWS credentials in System Settings.

There's all kinds of stuff wrong with this extension.