Hello

Seems the problem only show itself if i choose the grouping folder version. And I have a calibre library directory option in the Ubooquity. I not sure the folder view or the calibre the problem. I tried to put a header.jpg into the main directory still there is a broken jpg icon. But seems if i choose the Upper arrow then seems that ok in the flat view... I am a little confused :D I have only ebooks no comics nothing else in one calibre directory

This when not good: 

Hello

I just try to use RR first time and get this error even after put a header.jpg into my Calibre library
What I miss? Oh Second question can I get the header.jpg what u use I like that...