You have used all available variables allowed for this element. You should change it in your php.ini file. Contact your host regarding this.
Let us know how it will go.
We checked our memory limit and file size upload and nothing changes. Anyway the images are uploaded in the wordpress media library but they cannot be inserted just in this specific gallery.
Sorry for the late reply.
The error send is not responsible for your issue. Also the memory increase is not a solution either. Please check out this topic and read this article for more detailed information regarding this.
Please consult your host provider. Let us know.
