If there is an error in the moon sighting, and it is proven that we did not fast on one day of Ramadan, do we have to make it up?

No File Exists
Check below answers in case you are looking for other related questions:
Can the testimony of a woman be accepted with regard to sighting the new moon of Ramadaan?
If they did not find out that the month of Ramadan had begun until partway through the day, what should they do?

No File Exists
Related Answers:
They did not see the new moon of Dhu’l-Hijjah – what should they do?
Is there a certain length of time that the new moon has to be in the sky?
The Muslims should cooperate in sighting the moon and informing the authorities
Can the testimony of a woman be accepted with regard to sighting the new moon of Ramadaan?
If they did not find out that the month of Ramadan had begun until partway through the day, what should they do?

Recommended answers for you:
Are there any du’aa’s specifically for protecting a new house?
More Women in Hell Than Men?
He committed zina with her and she got pregnant; can he marry her while she is pregnant or should she abort he foetus?
Dhikr after salaah and before sleeping
Minimum distance of travel at which it is permissible not to fast and to shorten prayers