I have an El Capitan VM running on a Mojave host. Before upgrading to Fusion 11.5.1, I had no issues with the VMware Tools install.
Since upgrading, I've been getting :-
1. Expired certificate when running the upgrader (See Re: Certificates expired on VMware Tools for multiple Mac OS')
2. After uninstalling the 'old' VMWare tools and reinstalling, I get an error 'VMware Tools can't be installed on this disk. The version of OS X is too new.'