You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
It wants me to review settings. I click review now , it doesn't take me to anywhere that I can review settings.

That doesn't look like a facebook message to me. The leading comma looks suspect.
We are setting up a new ipad and have downloaded the app.
Try logging in on a browser session to see if it prompts you?
Will do. Deleted app and reinstalled and it still comes up.
That doesn’t look like a facebook message to me. The leading comma looks suspect.
Agreed.
Facebook is doing this sort of thing as part of GDPR. However, the bit before the comma should be your name. So either it's a scam pretending to be Facebook, or you've got some sort of security / setting which is blocking it.
To be on the safe side, click here instead.  https://www.malwarebytes.com/mwb-download/thankyou/
EDIT: sorry, I assumed a PC. So yeah, try logging in to the desktop website first as @somouk says.
Logging on via the Web seems ok. Would have thought an app would be OK.
Thanks s usual.
Best option - delete your account !
Liberating. Just deleted mine. Sick of seeing adverts and nothing from my family. Just so much junk on it. Plus I don't need to see what others are upto, nor do they see my activity. We use WhatsApp for family groups and sharing photos etc.