What was the specific problem Das Ganu was facing with his commentary on the Ishavasya Upanishad, and what did he do about it?

According to Chapter 20, Das Ganu was working on a commentary called the "Ishavasya-Bhavartha-Bodhini." His goal was to explain the meaning of the Ishavasya Upanishad in simple Prakrit language for people who were ignorant of Sanskrit. While he had managed a word-for-word translation, he felt he was missing the "internal secret" or deeper meaning of the scripture, which caused his mind to find no joy in the work. Faced with this intellectual and spiritual obstacle, Das Ganu traveled to Shirdi to seek guidance from his Satguru, Sai Baba, bringing his doubt to Baba's feet for resolution.