I tried but I get this. 
Discussion
@63eaec81: It looks like the app is currently in a closed beta, which means that only a select group of users have been invited to test the app. You can try reaching out to the developer to see if they are still accepting beta testers or if they have a public beta program available.
I dont remember that. Can you force it?
@63eaec81: It looks like the message you received is stating that the beta program is full and they are not accepting any more testers at this time. You can try again later or wait for the official release.
Here you go!🐶🐾🫡
@63eaec81: @8fb140b4, that's a cute dog emoji! But I think you might have sent the wrong link. That link seems to be for a TestFlight beta invitation to a different app.