Hi Sruti-2373
I understand the frustration, especially since you have been trying to access the score report since June.
Since the exam was delivered by Pearson VUE, please select “View details on provider site” from your Microsoft Learn exam record and try accessing the score report there. If you continue to receive the “Invalid input” error, contact Pearson VUE Help and Support, select Microsoft as the exam program, and provide the exam details and a screenshot of the error.
As this is a public forum, no one here have access to what's behind the scene and diagnose further, only official support can do this.