Build issue with Xcode 26.3

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Environment

• Xcode version: 26.3
• iOS version: 26.3
• Devices affected:
• Maps SDK Version: 11.19.1

Observed behavior and steps to reproduce

Build fails with below error:

Swift Compiler Error (Xcode): 'nil' is not compatible with expected argument type 'String'
ios/Pods/MapboxMaps/Sources/MapboxMaps/Ornaments/IndoorSelectorModel.swift:43:51

Notes / preliminary analysis

I am encountering this from a flutter application but It seems safe to assume that the issue is from the underlying iOS native library.

I am using this Pod workaround for now:

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  # Fix MapboxMaps 11.19.0 Swift compile error: 'nil' passed to non-optional String parameter
  # Track: https://github.com/mapbox/mapbox-maps-flutter/issues — remove this patch once mapbox_maps_flutter ships a fix
  indoor_selector = File.join(installer.sandbox.root, 'MapboxMaps', 'Sources', 'MapboxMaps', 'Ornaments', 'IndoorSelectorModel.swift')
  if File.exist?(indoor_selector)
    content = File.read(indoor_selector)
    patched = content.gsub('indoorManager.selectFloor(selectedFloorId: nil)', '// indoorManager.selectFloor(selectedFloorId: nil) // disabled: binary/source type mismatch in MapboxMaps 11.19.0')
    if content != patched
      File.chmod(0644, indoor_selector)
      File.write(indoor_selector, patched)
    end
  end
end

Additional links and references