What was the purpose of the 'Ishavasya-Bhavartha-Bodhini' that Das Ganu was writing, and what major hurdle did he encounter?

As explained in Chapter 20, Das Ganu undertook the project of writing the 'Ishavasya-Bhavartha-Bodhini' with the specific goal of making the profound teachings of the Ishavasya Upanishad accessible to people who were ignorant of the Sanskrit language. He aimed to provide an explanation of each word through simple Ovi verses in the Prakrit language. The major hurdle he encountered was that despite a word-for-word translation, he could not grasp the deep, internal meaning of the scripture, which caused his mind to find no joy or satisfaction in the work.