Problem with cloud sharing


i am trying to share folder from one pydio instance to another.
i have different websites … and want to access all of them from one place.
the pydio cloud is enabled, i added the server in trusted servers… i shared the folder, send invitation, received but when i try to access it i get:

There was a problem trying to open folder pydio://user@ocs_remote_share_ID…, please check your Administrator

Can you tell me what can be the problem and are there any steps written for doing this.
i am using hosting and the version of pydio - is latest, just downloaded it…