Error generating any sort of Output

I hope anyone can help me, I am fairly new to the (exist-db, tei, tei-publisher) - world, so I cannot rule out that I have not done anything wrong. SO for ensuring I did everything right, here follows a step-by-step of my doings:

1. reading the Documentation ( ;-) )

2. Uploading my ODD-customization I made a few days back with roma, I uploaded the .rng - file, was that the correct one to choose?

3. I created a basic xml in OxygenXML Editor, personalized it with the same .rng (I think I used the copy from my SSD not the one from the app/resources/odd) (probably a mistake here?) and uploaded it to the database.

4. I logged in as "admin" and uploaded a sample xml-file for my database (containing a -element with one picture in it and some basic "I have to try this out"-text (as far as I can tell, the TEI-file is okay, basic, but okay nontheless) when clicking on pdf I choose both options giving me the following error messages.

Output Error Messages as follows:

hope someone can clear this up!

Are there any tutorials/how-tos I missed? I am utterly confused, although I spent the past 3 weeks reading stuff an exist-db, tei, xslt, xpatth and xquery ...

best wishes, thanks in advance and I'm looking forward to hearing from anyone!

For when I get this working, I have not figured out exactly, how the @facs is viewed in the Shakespeare-Example (I think a

that roughly said contains the "images" behind it, but how exactly this is realized I am not quite sure ...) This example looks quite smooth, even from the viewer-mode (I dare not comment on coding-style or elegance, I am not good enough to judge :-D ). I'd really love to get something similar going for my project; at least zooming is quite the feature, especially for Early Modern or even middle Ages manuscripts (I am working on Early Modern Manuscripts ... :-D )