我在TFS2015服务器上添加了一个vNext构建定义来复制我的xaml构建，当我对构建进行排队时，我得到了一个我不明白的错误。这是错误：
Build started 12/15/2016 11:53:26 AM.
[error](2,1): Error MSB4025: The project file could not be loaded. Data at the root level is invalid. Line 2, position 1.
1>Project "C:\agent\_work\1\s" on node 1 (Clean target(s)).
1>C:\agent\_work\1\s(2,1): error MSB4025: The project file could not be loaded. Data at the root level is invalid. Line 2, position 1.
1>Done Building Project "C:\agent\_work\1\s" (Clean target(s)) -- FAILED.
Build FAILED.
"C:\agent\_work\1\s" (Clean target) (1) ->
C:\agent\_work\1\s(2,1): error MSB4025: The project file could not be loaded. Data at the root level is invalid. Line 2, position 1.
0 Warning(s)
1 Error(s)
Time Elapsed 00:00:00.06
[error]Process 'msbuild.exe' exited with code '1'.