Hello Cyril! You're right, the Addons Marketplace is currently quite slow. We're still investigating this issue and will keep the community posted as soon as we have an update. We appreciate your patience, sincere apologies for the inconvenience!
— PrestaShop (@PrestaShop) September 25, 2018
https://goo.gl/EO0ad1
https://goo.gl/xF8heB