Hi salvdangelo
It looks like to be permission issue wherein the user that you are logged in with does not have sufficient rights to delete the folder/file. When a folder is created for example via workflow that is created by user called "neolane" and your current user would not be able to delete those file/folder.
You can manage the same via a workflow ( Probably via curl command) or request support to have the current user added to the group to which neolane belongs so you have similar rights.
I hope this helps !!!
Regards,
Ananya Kuthiala