I've watched the full video and followed each step.
but I'm getting this issue.

Anyone can help me with it. I've looked up for solutions but none worked so far.

Acceptance Criteria

• Package validates the configured web redirect URL against Apple's requirements before making the request
• Invalid redirect URLs produce a clear error message with remediation steps in the exception/log
• README documents requirements for redirect URL format (HTTPS, no localhost in production, etc.)

Test Coverage

• Unit test: invalid redirect URL configuration raises a descriptive exception at auth initiation
• Integration test: valid redirect URL does not trigger the validation error

WSJF Priority Score

• Score: 5.33
• User/Business Value: 6 (Blocks Apple Sign In entirely for affected users)
• Time Criticality: 5 (Ongoing issue affecting new installs)
• Risk Reduction/Opportunity Enablement: 5 (Validation + docs prevent repeated failures)
• Job Size: 3 points (S — validation logic + docs)
• Calculation: (6 + 5 + 5) ÷ 3 = 5.33