When i go to set up my widget it says we cannot render the review page for you.
It look like you've already uninstalled our app on lit-up-curtains.myshopify.com, if you're willing to reinstall our app we're happy to help you resolve this issue.
Do you mean you found this problem while browsing our settings?
Could you please send us a screenshot of it at firstname.lastname@example.org once you reinstall the app, so our developers can have a look at it?
Perhaps it helps if you use a different browser or device to access the app.