I honestly don't understand why this is happening but all the decals I've uploaded will not show up when I try to use them as an image label. I know I have to set the image to "rbxassetid://" then what ever image I want to use but it isn't working. This is only happening with images that I've uploaded because when I set it to an older decal that wasn't made by me, it works.
It takes time to see your decals if you just uploaded them. They needs to get accepted by Roblox staff. If you can't see YOUR older decals, try this technique:
1. Open Toolbox 2. Go to "My Decals" 3. Choose any decal you want 4. Click on a part After pasting your decal on the part 5. Choose decal object inside that part 6. Copy it's ID 7. Paste to ImageLabel's ID property
If you ask why you should do it if you even can't see your older decals, in-game decal IDs and roblox site decal IDs are different. Roblox site decal IDs can be IDs of decals as items, not the decals itself.
What You Need To do is subract "1" off the end. So is the ID was something like 12345678, then the id for the Image Label Would Be 12345677.
**OR ** Find Your Decal, put it onto a brick, then copy the ID, it will have already subtracted one off the end for you.
REMEMBER : USE rbxassetid://12345677 . Otherwise it wont work (remove 12345677 for your ID with one number subtracted)