error MSB3073

Hi.
Install VS 2015 and Monogame 3.5.1
When i build UWP project this error appears:
1> Skipping C:/Users/user/Documents/Visual Studio 2015/Projects/ProjectWordStore/ProjectWordStore/Content/Images/GUI/Russian/nextword.png
1> Skipping C:/Users/user/Documents/Visual Studio 2015/Projects/ProjectWordStore/ProjectWordStore/Content/Images/Words/English/alphabet.png
1> Skipping C:/Users/user/Documents/Visual Studio 2015/Projects/ProjectWordStore/ProjectWordStore/Content/Images/Words/Russian/alphabet.png
1>C:\Program Files (x86)\MSBuild\MonoGame\v3.0\MonoGame.Content.Builder.targets(89,5): error MSB3073: The command ““C:\Program Files (x86)\MSBuild\MonoGame\v3.0\Tools\MGCB.exe” /@:“C:\Users\user\Documents\Visual Studio 2015\Projects\ProjectWordStore\ProjectWordStore\Content\Content.mgcb” /platform:WindowsStoreApp /outputDir:“C:\Users\user\Documents\Visual Studio 2015\Projects\ProjectWordStore\ProjectWordStore\Content\bin\WindowsStoreApp” /intermediateDir:“C:\Users\user\Documents\Visual Studio 2015\Projects\ProjectWordStore\ProjectWordStore\Content\obj\WindowsStoreApp” /quiet” exited with code 3.
Help please!!!

You can try to run the mgcb command from a command line. You probably have to be in the directory with the .mgcb file. That should give you more information on what the error is.