In fact, the file is in both sites but it looks like the url called is changed between the 2 sites. In prod, (/ips) when I inspect the image location, I have the url in the format <BASEURL>/uploads/monthly_2021_07/8_Regular.svg In test platform, the url looked for the image is <BASEURL>/topic/xxxx-Name o topic/monthly_2021_07/8_Regular.svg so it doesn't match the location which is the same as the prod instance. All the images in test platform are located in the same place as the production. Prod Forum https://avex-asso.org/ips/uploads/monthly_2021_07/8_Regular.svg Test Forum https://avex-asso.org/ipstest/uploads/monthly_2021_07/8_Regular.svg