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

please provide any suggestion on this.