How can one overcome the idea that there are scientific errors in the Qur’an, which persists with a person despite their faith?

What the questioner mentioned is nothing more than whispering (waswasah), and its cure is to completely ignore it, not pay attention to it, and occupy oneself with what benefits them in their religion or their worldly life, while seeking Allah’s help, persisting in supplicating and remembering Him, striving to acquire beneficial knowledge, and increasing in righteous deeds, especially reciting the Qur’an with contemplation and understanding.