Can you explain the problem Das Ganu faced in Chapter 20 and how Sai Baba responded?

According to the account in Chapter 20, Das Ganu was working on a commentary called 'Ishavasya-Bhavartha-Bodhini' to explain the Ishavasya Upanishad in simple language. Although he translated the text word for word, he found that he could not grasp its 'internal secret,' and his mind found no joy in the work. He took this doubt to Sai Baba in Shirdi. Instead of providing a direct explanation, Baba told him that the resolution to his doubt would be provided by a maidservant at Kaka's house upon his return. This illustrates Baba's unconventional method of teaching and resolving devotees' spiritual queries.