umap: background maps OSM-br/-cr/-eu doesn’t work anymore

Hi

Yesterday I decided to create a map based on umap one of this background maps: OSM-br / OSM-cr/ OSM-eu

However, when I select one of those today, the background map is empty. Even the preview image of those background maps aren't displayed (broken image symbol).

Is this only a temporary problem or has those background maps been deleted?

Kind regards