pages 'file does not exist'

pages file would not open on my iphone. whenever I clicked on it nothing would happen, when I tried to share there were no available sharing options, and when I tried to move/ duplicate the file nothing happened. I tried renaming the file to change the extension and got this message. the file is not visible from my icloud when I use my ipad or macbook. I have definitely accessed it from my macbook in the past, and wouldn't have purposefully deleted the file. does anyone know how I can access/ restore this?