Greyed-out document, won't open

My apologies for the awful photo quality. As you can see, I am trying to open Book Publicity but the document is greyed out (included another document next to it for comparison) and there is a thin line on the image which usually shows when the document is updating - but it isn't. It was last edited on my mac and previously I have had no problems opening it on both iPad and Macbook Pro with no problems etc. Both devices are fully up-to-date on software (iOS 9, OS X El Capitan) and Pages itself is also up-to-date. Any help greatly appreciated. Thanks.