Debug Samsung Tizen TV App- Flutter Expert- simple task

We have a Flutter Tizen Samsung TV app that is almost working. Need an expert to fix ONE remaining issue.

STATUS:
✅ App builds successfully
✅ App installs on Samsung TV
✅ App launches
✅ Return key works
✅ API returns correct data
❌ Shows "server is under maintenance" error

THE ISSUE:
App shows maintenance dialog even though API returns status:true with correct data. Need someone to debug and find why app shows this message.

REQUIREMENTS:
- Must have Tizen Studio installed
- Must have Samsung TV or Tizen emulator
- Flutter Tizen experience required

WE PROVIDE:
- Full source code
- All fixes already applied
- API credentials
- Build instructions