Also when trying to access to picture on browser (e.g typing homeassistant.local:8123/local/plan.png) I get error “404: Not Found”. Picture does still open I browser when I go File Editor → config → www → picture. Tried also jpg format or use ’ ’ but did not help.
Actually I got it working by looking your pictures. I added sub folder to www so now images are stored in config/www/images instead www. idk why they were not working directly from www but now all seems working fine.