Is going to an educational center before the 'Isha prayer, which leads to missing the congregational prayer, considered a legitimate excuse for missing it?

Effort should be made to schedule lessons at times that do not coincide with prayer times, in order to avoid missing the reward of congregational prayer in the mosque. However, if you miss congregational prayer due to studying, there is no sin, and you can pray in congregation with a colleague or anyone else outside the mosque, to achieve the reward of congregational prayer and not miss out on your interests.