[April 2025]

I recently faced a similar issue.

Note: My app status was unreviewed, and I wanted to only test with Internal Testing.

The Play console setup was complete, with all items struck. But I was still seeing this error.

In my case, it was just a warning, not an error.
After sharing the build link with the tester, they were unable to view the build on the Google Play Store.

All I had to do was:
Go to Internal Testing tab > Testers tab > And get the URL from the title [How testers join your test]. Tester was prompted to accept the invite to test the app and builds starts working with the same URL, which was not available earlier.

In order to get the build URL, head:
Internal Testing > Releases tab > Show summary > Click on version code > Opens new screen, select Downloads Tab > Copy shareable link.