Build an Alert Component Using Custom Elements

Hi, I’m having an error with the link to install Wix Block, it opens the Wix Market with the message: “You’re Invited to Try. To check out this app, add it to your Wix site.” And a button “Add to site”. When I click it and select my website, it throws me an error: “Seems That Something Is Wrong . The redirect url doesn’t match the one defined in your app configuration. Double check that it starts with https.” Any guesses?