for attribution in OGC layers and mapstore maps/contexts, the link is saved when the map is created, and the link breaks if the target url disappears -> check that logo urls resolve, and that the file at the other end has the right mimetype/size/ratio ?
eg in the credits bit for mapstore maps, example of a now broken link:
logo":{"height":"932","width":"709","format":"image/png"},
"imageUrl":"https://www.craig.fr/sites/www.craig.fr/files/images/logo%20CRAIG_sigle%20seul-01.png"
for attribution in OGC layers and mapstore maps/contexts, the link is saved when the map is created, and the link breaks if the target url disappears -> check that logo urls resolve, and that the file at the other end has the right mimetype/size/ratio ?
eg in the credits bit for mapstore maps, example of a now broken link: