Hi DiapDealer, I was referring to the mentions in pink:
attribute 'target' is not declared for element 'a'.
Well, I am a newbie and Dutch, don't know anything about attributes, targets, values, etc. It is Chinese for me (so I am now on the verge of throwing my e-book out of the window

).
I might want to publish it, but most importantly I don't want my e-book to have any errors or causing other problems when people read it.
I don't know what you mean with 'removing all "target='blahblahblah'" attributes/values from your links'?
Could you specify exactly which code in the example (printscreen) I have to remove or adjust?