WordPress recently updated the Widget editor and turn it into a Block widget. Genesis framework is still disabling the block widget for now.
You still can use Classic widget. Follow this steps to install the additional plugins
To install the plugin from your plugin directory, follow this step : https://support.skyandstars.co/article/how-to-install-a-wordpress-plugin-from-plugin-directory/
Installing the Classic Widget Plugin
Go to Plugins > Add New > search “Classic Widget” from the plugin directory.
After your classic widget plugin is activated, delete the Block widget item from your Widgets. And use the Classic one like usual.
Please let me know if you need any help and I will assist you. You can reach me on Etsy DM or the contact form.