Gamepigeon not working anymore.

Hey.

the gamepigeon app stopped working suddenly.

it’s not even on the iMessage bar anymore.

when i went to the app store to download it I found that it’s downloaded and there’s the button “open” instead of “get”.

the open button won’t take me anywhere.

so it’s installed but I can’t open it.

help please.

p.s: my system is up to date.