Edit: Didn’t realize you solved it yourself ??
I have that plugin up and running at my website.
When i updated it, it stopped showing up (just showed a blank), until I realized that it was because I had the settings wrong within the plugin php file. Check to make sure you have the settings right (most of the time it’s the path to your pixelpost folder within the settings that is wrong.)
For example, my blog resides on the base /public_html/ folder, and my pixelpost blog is within /public_html/pixelpost/
Thus, in the plugin file, the setting is:
$PixelPost_local_address = “./pixelpost/”;