svitek-tc0/en

The illustration shows what such an error looks like. In order to find out what caused it, we need to look into the code.

Considering that in this case, the template {{svitek}} is called out only once, it is clear where to look for the error. It was on page svitek-con0, but as you can see, everything seemed to be in order at first glance. Therefore the code of the template {{svitek}} has been interpreted correctly. As you can see on the screenshots though, it was a page with prefix svitek-.

All that was necessary to solve the problem was to change the template name from {{svitek}} to {{skok}}.