What is the ruling on sleeping after 'Asr, and is the Hadith, "Whoever sleeps after 'Asr, let him blame no one but himself," authentic, and what are the harms of that?

Some of the early Muslims (Salaf) disliked sleeping after Asr prayer, because it could cause obsessive thoughts (waswas). And the Hadith, "Whoever sleeps after Asr and loses his mind, let him blame no one but himself," is weak and not suitable for practice.