What version of PHP are you using?
I’s PHP version 5.4.4-14 and WordPress 3.9.1.
That usually means they the image we are trying to process either doesn’t exist or is corrupt. Do you get this message on every page?
I am guessing this is working for you now.
I have the exact same problem.
Wordpress 4.0, PHP 5.5.14 on OS X Yosemite (10.10), Zend Engine 2.5.0
plugin version 6.8.0
And I checked, the images are in the cache folder
PHP Fatal error: Call to undefined method WP_Error::get_size() in
[path]/wp-content/plugins/app-store-assistant/includes/app-store-functions.php on line 2315
Please try download the 6.9.0 beta version. It has a few fixes for the cache folder. You will need to rebuild the cache once installed. The amazon.com section is not fully finished, but for the most part should be fine to use.
Since you are using Yosemite, I am sure you are okay with betas. 😉
Actually, for some reason, it started working after I set up image magick on my server. GD was already active, but actually, your plugin called wp_get_image_editor, and that method returned wp_error telling “image_not_” something…
In case other people have the same problem as me, the solution was to install imagick.
Default PHP version on OS X Yosemite is 5.5.14, so using homebrew, you just add the tap “Homebrew/php” and install php55-imagick, then you add the imagick extension in your /etc/php.ini
I posted a longer information on my blog, in french
I will give it a try on a default Yosemite installation after adding MySQL. Perhaps they do not include a Image Engine.
Mine is doing the exact same thing. Where can I download the beta version?
Fatal error: Call to undefined method WP_Error::get_size() in /home/content/20/7559620/html/wp-content/plugins/app-store-assistant/includes/app-store-functions.php on line 2315
