Cannot install Painter 2019 on macOS Catalina

I've just upgraded to macOS Catalina and I cannot install Painter 2019. The installer gets as far as the "Preparing for installation" step when I'm met with the following error:

This package is incompatible with this version of macOS.
The package is trying to install content to the system volume. Contact the software manufacturer for assistance.

Has anyone been able to install on Catalina?