From Ian Grieve, what to do when Web Client images are not loading
— Read on www.azurecurve.co.uk/2019/09/web-client-images-not-loading/
Web Client images not loading – azurecurve
Install, Upgrade & AdminMicrosoft & the GP Ecosystem
Archived post from 2019. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.