Why was Das Ganu struggling with his work on the Ishavasya Upanishad, and what did he do about it?

According to Chapter 20 of the Sai Satcharitra, Das Ganu was working on a commentary called the "Ishavasya-Bhavartha-Bodhini." His goal was to make the profound teachings of the Ishavasya Upanishad accessible to people who were not familiar with the Sanskrit language by translating it into simple Prakrit. However, despite translating it word for word, he felt he could not grasp the deep, internal secret of the text. This lack of understanding caused his mind to find no joy in the work. To resolve this doubt and find clarity, he traveled to Shirdi to seek guidance at the feet of his Satguru, Sai Baba.