Notice: Trying to get property of non-object en theme_pdf_formatter_default() (Line 62 in ... /pdf/includes/pdf.field.inc)

Issue Summary

Ive been running into this problem ever since I updated the module to 7.x-1.1 and also updated the pdf.js to the current version in git.

Fortunately, Ive managed to fix it for myself changing the line 62 from:

$file_url = file_create_url($variables['file']->uri);

to:

$file_url = file_create_url($variables['file']['uri']);

I hope this can help anyone with a similar problem.