Seafile Client - Connection closed when opening a file


I have Seafile server running on a Windows server machine. I have a container with a bunch of folders and items inside. By web address or IP address (remotely and on-site) the seafile client connects and is able to find the container , with the folders and its content.
The issue i’m finding is that when I double click the item I would like to open (pdf, .mov, .docx, .jpg) the Seafile client throws a “Failed to download file: Connection closed” message.

I have no clue what I’m missing, can you please orient me in what I might be doing wrong?

I will be greatly appreciated.