We need to know a lot more if we're going to help you. Please provide answers to the questions listed here: "FAQ: What information should I provide when asking a question on this forum?"
The GPU has almost nothing to do with whether a template project works with After Effects.
These two things are unrelated.
First, all that the GPU message is telling you is that your computer system can't use the GPU acceleration for one feature. That is no big deal.
Second, we need a lot more detail beyond "doesn't display fully" to be able to help you to troubleshoot your issue with a template. Please provide answers to the questions listed here:
Also, if someone sold you a template, you should be able to ask them for help using it.