Gmail Compose icon has been replaced with a Two Pages icon that displays a photo of my Inbox

My Gmail Compose icon on my iPad has turned into a Copy (2 pages) icon instead and it displays a photo of my Inbox so I am not able to Compose a new email. Everything else with Gmail works. I just can’t remove the Copy icon and get back to the Compose icon. I don’t know what to do to get the Compose icon back. Everything else with Gmail works. The Compose icon is still on my iPhone.