Hey @pinktonio Yes, I have fixed this issue. I have added a new scope  "checkout_branding_settings". and  reinstall the app issue was solved by following steps

Hello Team,Required access: The app must have access to checkout branding settings and the shop must be on a Plus plan or a Development store plan. "errors": [{"message": "Access denied for checkoutBrandingUpsert field. Required access: The app must ...

Remove the accepted partner account from my account and remove duplicate created account by mistake