I'm wind element, and tried to train a Fire jutsu and got the following message.
You are not the correct element to get the jutsu you have chose.
The last word should be chosen. And there should be a hyperlink that allows you to go back to the jutsu page. Granted most everyone is tech savvy enough to use the back arrow.
Here are a couple of other ways to say it that may indicate to the player to check the 3 elements listed at the top of their jutsu page.
The jutsu you have chosen to learn is from an element you do not have. Please choose a different jutsu.
The jutsu you have chosen to learn is not from one of the three elements you know. Please choose a different jutsu.