Ron, you say you tried 'the LR template': there's a large number of them in the Template Browser on the left of the Print module screen. If you pick any one of them, you can change the various parameters on the right side of the screen- Layout, etc. Clicking 'Identity Plate' under Page options on the right does display the identity plate if I have selected one of the LR templates in the Browser on the left. if you're doing exactly that and still not getting the identity plate, then your problem is different to mine.
As mentioned, if you right click the chosen LR template from the Template Browser, you have the 'New Folder' option, which if selected will place that template in a new folder, named as you like, in the Template Browser, from where you can right click and update it with your chosen current settings, and get the identity plate to display if you want. That's how it works for me.
I should add I have the standalone version.
Sorry if this doesn't help further.