If you have a computer with Windows 7, the CISA Reader App, as installed from AERO repository, might not run.
Windows 7 is not supported officialy since years, and you shall consider to purchase a new computer.
CISA does not grant support for Windows 7 starting from March 2025.
Download and install CISA Reader App version 2.1.0 only for Windows 7.
CISA Reader App 2.1.0 installer