Question

Перевести обращая внимания на модальные глаголы There must be some mistake here.

Answer 1

Здесь должно быть какая-то ошибка

Answer 2

Здесь должна быть кое-какая ошибка.

Answer 3

This sentence is already in English, so I will provide the translation to Russian, paying attention to the modal verbs:

"Тут должна быть какая-то ошибка."

The modal verb "must" expresses a strong belief or conclusion based on evidence or deduction, and in this sentence it suggests that the speaker is certain that there is a mistake. The Russian equivalent is "должен/должна/должно," which also indicates a strong probability or necessity.