Unable to force quit Pages App on MacBook Pro
When I go to the "Purchased" tab in the App Store, Pages has an install button next to it instead of an update button (even though it's an app I frequently use). When I click install, a box eventually pops up telling me that Pages cannot be installed while the app is open. To remedy this, I've tried to force quit the app (clicking the option on the app and also using control keys), but it doesn't work. The app doesn't even show up on launchpad or the Activity Monitor. I'm confused as to how to solve this issue and would appreciate any guidance.
MacBook Pro 13", macOS 10.13