Why is this happening install button not working

[Omarc]

I don't know why the install button is like this

 

[Omarc]

https://imgur.com/a/YZqwZ

 

[Member 1919122]

If it's greyed out, are you sure it's not already installed on your phone? Also it could be your device is not compatible with it

 

[Omarc]

I used that app before it's been doing this too a lot of apps