What is the ruling on performing Umrah when there are family problems between the husband's sister and the brother's wife, and how can one rectify oneself regarding these problems?

What is Islamically required is affection and love among Muslims, and this is particularly emphasized concerning in-laws. The advice here can be summarized in four points: patience with the harm caused by the brother's wife, forgiveness and pardoning, advising her with wisdom and good counsel, reminding her of Allah and the rights of brotherhood, and striving for reconciliation and harmony, especially during a journey of obedience like Umrah, where souls are prepared to accept good.