How can one respond to claims made by Christian websites regarding the existence of grammatical errors in the Noble Quran?

We commend your zeal for the religion, and we advise you not to enter misguided websites until you are fortified with religious knowledge. This is because the doubts raised by these individuals are ancient, and scholars have already answered them. The Qur'an challenged the Arabs, masters of language and eloquence, to produce its like, and they failed, which is proof of its miraculous nature. We recommend that you consult books such as: "Al-Jawab al-Sahih li man Baddala Din al-Masih" by Ibn Taymiyyah, "Hidayat al-Hayara" by Ibn al-Qayyim, "Al-Fasl" by Ibn Hazm, the introduction to Tafsir al-Qurtubi, "Mu'tarak al-Aqran" by Al-Suyuti, and "I'jaz al-Qur'an" by Al-Rafi'i.