Hello!
PHP 8.0 and lower are no longer maintained and considered insecure: https://www.php.net/supported-versions.php.
Nevertheless, the previously tagged versions are available in the Advanced section of WordPress plugins: https://projectdmc.org/plugins/autodescription/advanced/.
I keep the latest iteration of every major version (from v2.6) and every minor update of the current major version.
4.2.8 is compatible with PHP 7.2 and higher.
5.0.x is compatible with PHP 7.4 or higher.
Here’s a direct link to v4.2.8: https://downloads.projectdmc.org/plugin/autodescription.4.2.8.zip.
Still, I recommend resolving the technical issues and upgrading to a support PHP version; this shouldn’t take longer than a few minutes per plugin since most of the changes necessary are syntax-based.
Please note that I can no longer provide support for TSF v4.2. Since then, I’ve made over 1,200 changes to the plugin, most of which aim to resolve or mitigate quality issues.