I had many problems with the new update to XenForo 1.3.0 Beta 3 pictures no longer displayed, plenty of other worries, I correctly install with all XenForo file, I do not know how to fix all the problem is.
From what I can tell, your problems appear to either be style or add-on related. I eventually tracked down an image and its URL isn't possible without an add-on. That last error message is from an add-on.
You haven't enabled the default style, but the issues you're pointing out generally appear to relate to the style in question.
You'd need to disable ALL add-ons and use the default style and then see if you can confirm any issues.
I disable all add-on and see what add-on causing the problem, I have solved almost every problem, it remains for me that the bug has its be paid, the information under the title of a focus is no longer displayed: http://prntscr.com/2szdam