Hey there,

After a long debug, for some reason there is no record for the avatar of this existing group Bucerias in this #__social_photos table so the system misunderstood it and tried to get all the EasySocial's photos of your site to copy for the copied group and that is why it took very long to load.

So far this issue only happen in the existing group and it seems working fine to copy the newly created group.

Can you try to reupload the avatars of the existing groups which have avatars uploaded and try to copy again and see how it goes?

Also, can you provide us with your FTP and PHPMyAdmin access so that we can have a better check of it if the issue still persists?