Can you explain Das Ganu's project and the problem he faced as described in Chapter 20?

According to Chapter 20 of the Sai Satcharitra, the devotee Das Ganu undertook the task of creating the "Ishavasya-Bhavartha-Bodhini," a commentary on the Ishavasya Upanishad. His noble intention was to make the profound meanings of this scripture accessible to those unfamiliar with the Sanskrit language by explaining it word for word in simple Prakrit Ovi verses. However, while doing the translation, he found that he could not grasp the internal secret or deep essence of the Upanishad, which left his mind without joy. Faced with this doubt, as the chapter narrates, he sought the guidance of his Satguru, Sai Baba, by traveling to Shirdi.