Add access to my domais - PlayerVersionUtility.html

Hello everybody.
I am trying to use the PlayerVersionUtility.html tool to get “edit a player’s JSON source directly” as it is said in some Kaltura documentation this is possible through the “Kaltura Player Version Utility Page”.

However when I try to access that page I receive the following error message: “Error, Kaltura page can’t run on this domain,”

Does anyone know where I can perform this configuration? I’m currently using version 15.3.0. on kaltura.

Thanks in advance