An image asset uploaded to canvas loses its link to canvas after project is cleaned or moved (not sure which of the two caused it. Causes error: “could not open filename.jpg” after which the project does not run. Trying to fix the problem by editing the canvas does not work, it just throws an error. I think it’s better to 1) To still be able to accesss the canvas in such a situation to fix assets with broken links, 2) Assets linked to the canvas should persist once you click save in the canvas editor such that moving the project folder or cleaning the project would not break the link.
After poking around a bit, I noticed that the ‘Bundled’ folder in the project folder, which contained a folder holding the canvases in use, did not contain the image asset in question, but contained a sound file set up following these steps: https://devga.me/tutorials/armory3d/sound-and-music/ where apart from placing the sound asset in the bundled folder, it was also linked Outliner>DataBlocks (Data Api in Blender 2.8) and made a fake user. Wondered if this was the preferred process for linking media generally when working with the UI, but for that to work, there would have to be a way to connect the stored image in blender, to the canvas rather than navigating to it’s folder location as if attaching afresh.
Copying the image file from it’s location to the ‘bundled’ folder, finding the json file for the canvas and editing the file location, gives a temporary fix, but that fails once you clean the project again, and just doesn’t work anymore afterwards. I don’t know if this is a bug or just something wired wrongly.