So right now I am currently making a tycoon and It involves GUIs and whenever I try upload a photo on an Image Label its not working at all, it just turns white and does not accept my image at all. with that being said, I did look in the output and it says:
12:02:43.163 - Image "rbxassetid://596253700" failed to load in "StarterGui.ShopGUI.ImageLabel.Image": Failed to resolve texture format
and that is all really... It just doesn't work..
The current rbxassetid://596253700 is a decal. In order to put the decal into a surface, you need the ROBLOX Image (vs the ROBLOX Decal). When you upload a decal, it makes a decal, however the actual image is stored as an image asset. Usually, you find the actual image by subtracting one or two from the ID. If you take a look at https://www.roblox.com/library/596253698/Images-caveman (where two is subtracted from the id), it shows an image (not a decal) that you need to use use. From this, this is the rbxassetid you want to use.
TL;DR: change rbxassetid://596253700 to rbxassetid://596253698
I have no idea but because it says Failed to resolve texture format I'm assuming the photo ur uploading is the wrong format. Make sure the extension is .png