Invalid Displayed Gallery error NextGEN Gallery

Question

I have using NextGEN Gallery on WordPress. When I updated NextGEN plugin v2.0, soon I start receiving error message "Invalid Displayed Gallery" on the page where NextGEN gallery shortcode added. Even more, I'm unable to view 'Display Type", while inserting a gallery on the page. Please see following screenshot.

Answer 1

Both errors deal with the new version of NextGEN Gallery Plugin in WordPress. Just follow below steps,

1. WordPress Admin > Gallery > Other Options
2. Reset Options > Click on button Reset all option to default settings
3. Done

Now, try to add/modify a Gallery on any page. Now you can watch Display Type which was blank earlier. Like the following screenshot.​

 Soon, you need to re-add the galleries on affected page. You can view working gallery.