It seems that the old Image viewer from the appstore is used in this tutorial. You can find it here:
Thanks Lennart, I have used this one https://appstore.home.mendix.com/link/app/13/ y’day and it resolved the problem. However I am curious, how come an old version is still shipped in Mendix 8.10.2?. I tried the same even in Mendix 8.15.1 as well and had the same issue. I do not see any warning that the widged in play was an old one. Is this normal with Mendix?.