Have you checked that they actually got installed? ie is the directory containing the templates present? Are the templates in it? Do you have any environment variables present that are controlling where NX looks for templates?
You can start by trying to find out what pallet files it is looking for. In the log file search for the .pax extension and see what it it trying to read in. If the pallet files are find look at them and see what .prt files it is calling on. Make sure those files exist. That is a good place to start.
BTW, you the same question twice.
Just letting you know, I have merged your posts and the replies you have gotten so far into one thread that way it's easier for you to get answers from people in the forum