Error in reading three D vector data

I am trying to read vector data (3 dimensions). I am getting an error while reading however similar script works scalar data. Please find the attached .vtu file.
phi1.vtu (2.0 KB)


As you can see below, the NumberOfComponents for f_9 is 4. However, it looks like this value should be 3.

<DataArray  type="Float64"  Name="f_9"  NumberOfComponents="4" format="ascii">