BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:
@booklet{EasyChair:11000,
author = {Elizabeth Chou and Amanda Boyd},
title = {Estimation of Concept Explanations Should Be Uncertainty Aware},
howpublished = {EasyChair Preprint 11000},
year = {EasyChair, 2023}}