Error when adding new gallery / editing gallery image etc

I don’t know how this has happened but this morning I went into the admin and tested to make sure the issue was still there – which it was. I then deactivated all my plugins again, and reverted to a default theme, checked for the error as I did before – still there. I turned back on all my plugins & re-activated the theme, and then tested one last time… resolved?!
Not going to mark this thread as resolved quite yet as it seems so odd that doing that can fix the issue and want to make sure it is still all ok after a day.

Getting the same error and can’t resolve it:

Notice: Undefined index: foogallery_retina in /Users/myuser/mysite/wp-content/plugins/foogallery/includes/admin/class-gallery-metaboxes.php on line 183
Call Stack
# Time Memory Function Location
1 0.0033 211996 {main}( ) ../post.php:0
2 0.7584 24958480 edit_post( ) ../post.php:193
3 0.7643 24968152 wp_update_post( ) ../post.php:378
4 0.7649 24976424 wp_insert_post( ) ../post.php:3583
5 0.8329 25025180 do_action( ) ../post.php:3510
6 0.8329 25025600 WP_Hook->do_action( ) ../plugin.php:453
7 0.8329 25025656 WP_Hook->apply_filters( ) ../class-wp-hook.php:323
8 0.8505 25084420 call_user_func_array:{/Users/myuser/mysite/wp-includes/class-wp-hook.php:300} ( ) ../class-wp-hook.php:300
9 0.8505 25084608 FooGallery_Admin_Gallery_MetaBoxes->save_gallery( ) ../class-wp-hook.php:300

I am on OSX 10.11.6 El Capitan and using AMPPS.
The run test button for the thumbnail is working fine so I know gd is installed properly.

Can somebody help me ?
Thanks

My issue seemed to be specific to pluggable.php and is still miraculously fixed… really unsure why it is fine now, but glad it is of course. *not much help for you Caro1302 sorry*

@caro1302, this error has been fixed in the latest version which I am releasing this week.

It is a PHP warning that you should not get on a live site.

For a temporary fix, until the update comes out, I’ve found that if you select at least one of the retina options, the error does not exist. It only seems to happen for me when none of the retina options are selected.

please can you update to the latest version and check if you still get this error