Short answer
Create a review account that works without your help, and add it on the Sign-in details page in Play Console. Explain any one-time code, 2FA, invite code or location check in Any other instructions. Then send the changes for review from the Publishing overview page.
Rather not fix it yourself? App Fix Ticket starts with a fixed-price diagnosis, then a fixed price for the fix before any fix work.
Why the reviewer can’t get in, and the fix
01
No sign-in details were given
“you must provide all required details to enable access to your app.” Google Play Console Help, Prepare your app for review (Sign-in details)
If any part of the app is behind a login, a membership, a location or another form of authentication, Play needs a way in. Add the username and password, or the steps, under Sign-in details.
02
The login needs a code the reviewer can’t get
“Use the "Any other instructions" field to let us know if there’s anything special about your login mechanisms” Google Play Console Help, Prepare your app for review (Sign-in details)
An SMS code, an email link, 2FA or an invite code blocks the reviewer. Give the review account a fixed code or a test phone number, or turn the extra step off for that one account only, and explain it in Any other instructions. Never add a fixed code that works for every user.
03
The account expired or was locked
A trial that ended, a password that was changed, or an account locked after failed tries stops the review. Keep a dedicated review account with no expiry, and check it before each submission from a fresh device against the production backend. Geo-blocks, captchas and rate limits stop reviewers too.
04
The account has no content
An empty account can hide the features the reviewer needs to check. Fill the review account with sample data, and give it any paid or admin access the app gates behind a plan.
05
The fix wasn’t sent for review
“Open Play Console and go to the Sign-in details page. Update your Sign-in details information and click Save. Go to the Publishing overview page.” Google Play Console Help, Prepare your app for review (Sign-in details)
Updating the details isn’t enough on its own. Save them, then send the change from the Publishing overview page.
Checked against the vendor’s docs on : Google Play Console Help: Prepare your app for review.
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Related: Google Play account deletion requirement · Google Play invalid privacy policy · Google Play 12 testers for 14 days · Google Play bundle signed in debug mode