It looks like you have the wrong paper size set in Page setup/printer settings.
You cannot fit those templates on smaller 4x6 paper size.
I had 10x15 cm paper size
Now i change it to A4 format and its still not working. When i look on youtube print tutorial, they still have "work board"
- when they click on some template, the "work board" will makes changes. I must have deactivate something, because i couldnt see templates on "work board" in the middle :-(
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All what i had to do was: create a new PC account - another user -> log in new user -> start lightroom