Hiding "Continue" button in "Max Devices Reached page"

[rezaalikhani]

Hi;

I want to hide the Continue button in Max Devices Reached page in Self-Registered Guest Portal, as you can see below:

According the following link, this requirement has already a solution:

https://community.cisco.com/t5/security-knowledge-base/ise-guest-self-registration-portal-basic-customization-options/ta-p/3636341#toc-hId--1313318517

But without success...

Does this solution only work for older ISE releases as I am using ISE 3.2?

Thanks