Touch Display 3.3.1 works on Volumio 3.165. I just installed a fresh Volumio and successfully installed the plugin.
@ianpaulstone I suspect you had a download error during the installation process of the plugin. When the plugin installs it has to download a lot of additional software packages in the background. From time to time a download fails and you get such error messages.
I suggest to uninstall the plugin and try to re-install.
In the past (Volumio 2) it was also necessary to wait several minutes after the first boot of a new Volumio installation so the data partition could fully expand. I don’t know if this is still valid for Volumio 3, but I guess so. On a system where the data partition had not been expended there is typically not enough space for all the software the Touch Display plugin needs.