BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:
@Booklet{EasyChair:5436,
author = {Amol Dhakne and Deep Shah and Rohit Gore and Rudraksh Agrawal and Swapnil Sharma},
title = {CopFriendlyApp - ESeva},
howpublished = {EasyChair Preprint no. 5436},
year = {EasyChair, 2021}}