This is the 1066th most frequent Spanish word.
ninguno
"None" or "not any."
In this sentence, 'ninguno' is used as a pronoun meaning 'none' or 'any' referring to a specific set of items, i.e., the books mentioned earlier.
No tengo ninguno de los libros que mencionaste.
I do not have any of the books you mentioned.
Here, 'ninguno' is used to refer to 'none' out of a specific group (them), indicating that no individual from the group wanted to come.
Ninguno de ellos quiso venir a la fiesta.
None of them wanted to come to the party.
In this case, 'ninguno' is responding negatively to reject the existence of any errors in the report, used as a pronoun substituting the noun 'error'.