It says "Nelze najít text k předčitání" which means that no text to be read was found. Just a small beta error I guess ;)
THIS is TENTO or TENHLE. It is an object that is right here, i can touch it.
"This" and "That" in English tends to indicate distance from speaker. Does Czech hold the same meaning in the case of "ten" vs. "tento/tenhle"?