xenforo 2.0.4

I do not get any error just do not update the phrases, continue with the previous sentences

Xenforo v2.0.4 testing in a subfolder the xenforo 2 have if I upgrade to the new version, I find this problem 1. You can not add codes to the template anymore. Templates-PAGE_CONTAINER Oops! We ran into some problems. Oops! We ran into some problems. Please try again later. More error details...