It may have to do with the fact that Adobe Flash is either interfering with the installation or the removal of Adobe Flash because it no longer is supported is prohibiting the initiation of the installation. Either way, there has to be a workaround.
January 13, 2021
Adobe Flash Player EOL General Information Page
Since Adobe no longer supports Flash Player after December 31, 2020 and blocked Flash content from running in Flash Player beginning January 12, 2021, Adobe strongly recommends all users immediately uninstall Flash Player to help protect their systems.