Error: Internal problem during semantic analysis of MXML

[Serkan Taş]

Hi,
When compiling test project, getting the error below:

github\royale-testing\src\main\Main.mxml(65): col: 9 Error: Internal 
problem during semantic analysis of MXML

<s:DefaultGridItemRenderer textAlign="left" />
^

Source repo : 
https://github.com/nihavend/royale-testing/blob/master/src/main/Main.mxml

Thanks,
Serkan