Not all Aes Sedai are strong like some of the more notable Aes Sedai in the series some are relatively weak and if she was one of the weaker Aes Sedai and was travelling alone or even just with her warder it likely isn't impossible for her to be overwhelmed by a group of white cloak.
Aes Sedai Executions
in Wheel of Time TV Show
Posted
Not all Aes Sedai are strong like some of the more notable Aes Sedai in the series some are relatively weak and if she was one of the weaker Aes Sedai and was travelling alone or even just with her warder it likely isn't impossible for her to be overwhelmed by a group of white cloak.