Can't write a name of an object

Hi everyone! 

I am trying to give objects (events, activities, etc.) a name, but when i'm filling in the box a black crossing line appears, i can't see what i'm typing and the text doesn't end up on the object, and if does - i can't amend afterwards. Also, the box for text isn't white as supposed, but transparent instead. Please advise a way to solve it, nothing i tried seems to work