Samsung UE40ES5500 "No supported file" on all files

I'm using Serviio (on Ubuntu Desktop 12.04 LTS) for a few days no and everything used to work fine. However, suddenly it stopped working.
Every file I select (if it is a music file, a video file or any other file) it gets met the message "File not supported" on my TV. I have given my TV a fixed IP and selected it as SAMSUNG C/D/E device in the Renderer Profile. I also noticed that the icon of Serviio is not shown on my Samsung TV anymore, in stead it is using a default icon for DLNA (a computer).
I enabled extended logging (DEBUG) and attached my log in the attachment to this post.
I hope you can help me out!
Every file I select (if it is a music file, a video file or any other file) it gets met the message "File not supported" on my TV. I have given my TV a fixed IP and selected it as SAMSUNG C/D/E device in the Renderer Profile. I also noticed that the icon of Serviio is not shown on my Samsung TV anymore, in stead it is using a default icon for DLNA (a computer).
I enabled extended logging (DEBUG) and attached my log in the attachment to this post.
I hope you can help me out!