If you use Norman's WebP plugin in Sellerdeck you will need a later version of MagicZoomPlus.js (Magic Zoom Plus v5.3.7
Copyright 2023 Magic Toolbox) for the click to zoom function to work with WebP.
The alternative in Sellerdeck Settings, Site Options, Zoom Images Control, is to set 'Action on click' to 'none'.
https://www.magictoolbox.com/magiczoomp ... cba1185463