I am trying to preview razor template enabled page but I am getting error "Unable to get template type with ID 8 for item tcm:xx-xxxx-xxxx." not sure it requires Razor mediator to be installed.

but is there any other way where configuration not required for Razor mediator on CME.

I am looking for an alternative solution for Razor mediator on Tridion sites 9, i do not want to install/configure Razor mediator on Tridion sites 9

As there are legacy templates(razor) exist on cme, while running template builder it always throws error mentioned above. for any template on cme.

please provide any suggestion on this.