No "customize" link to edit my personal room Invite Link

I need to change my personal room Invite link to something people can quickly access and remember. The directions I received online are not working for me due to when I go to Personal Room>Edit> the only field that becomes editable is the Meeting ID. In the online directions it says the Invite Link is able to be changed by going to Personal Room>Edit>Customize (next to Invite Link). That command is not visable to me. What could be happening? Thank you!