ESA-supported ESXi version details are available in below Virtual Appliance Installation Guide  https://www.cisco.com/c/en/us/support/security/email-security-appliance/products-installation-guides-list.html

Hi, The current (15.0) ESA template is VM hardware version 10, ESXi 8 supports it. VM hardware version Vs ESXI  https://kb.vmware.com/s/article/2007240 FYI, We are also working on a template with VM hardware version 19 and with VMware-recommended har...

Without URL filtering license, the content filter with URL Category and Reputation will not be enabled

please report to TAC

This was a known issue (CSCwc33165) in 14.x, and fixed in 15.0. what is the version you are using?