I would first just like to say, I am in no way affiliated with this plugin, but I understand the frustration when something like this fails brining down a website. Like you I found that rollback doesn’t seem to be able to find the version to install it. So here is how you can get a copy of the previous version.
On the plugin page in the www.ads-software.com repository there is an “Advanced View” link on the right hand side part way down the page which takes you to https://www.ads-software.com/plugins/yith-woocommerce-catalog-mode/advanced/
At the bottom of the page is a drop down, select version 2.40.0 and download the zip file. You can then use this to install the plugin again. If you can’t get to your admin panel to do this, on the hosting server rename the folder yith-woocommerce-catalog-mode to something else. This wil deactivate the plugin, therefore allowing you access again to install the old version.
I hope this is helpful to someone.
Regards
Janette