When I try to load a new image (painting or graffiti) it doesn’t load. What should I do?

A need a few more detail, what steps did you do and what do you see now? Please append server and client log.

I went into the creative menu, grabbed the graffiti, clicked on the block with it, opened the gui, copy pasted the image link in and clicked load, but then it wouldn’t load.

Does it show the upload progress, does it finish, does it close the gui afterwards, can you see the image in the gallery?