Hi Ark,
Your Drive URL is like this right?
https://drive.google.com/file/d/1RkJXfe8soaj2AVSmvJFE1VGPxnPdixAr/view?usp=sharing
In here remove the part that after the ID/. Once I removed I get this.
https://drive.google.com/file/d/1RkJXfe8soaj2AVSmvJFE1VGPxnPdixAr/
And then add preview there and check the app. At the end the URL will be like this.
https://drive.google.com/file/d/1RkJXfe8soaj2AVSmvJFE1VGPxnPdixAr/preview
And change the drive URL access to public if you haven’t done it yet!
Thank you