وَلَا عِنْدَ غُرُوبِهَا إِلَّا عَصْرَ يَوْمِهِ،
Translation: Nor at the time of sunset, except that day’s Asr prayer.
The exception concerns only the Asr of that same day, which can still be completed before sunset, although intentionally delaying it so long is blameworthy. It is not a license to offer other makeup prayers at sunset.