XSLT Transformation error in BLS for MII V12.0

Hello Experts,

I am trying to transform a XML Result set coming from one of the data query in BLS  and directly assigning this output to the INPUT of XSLT transformation action block .

Unfortunately, I am getting the below error :

  [ERROR]: XSLTransform error: The markup in the document following the root element must be well-formed.

But the same steps I performed using a XML editor, there I am getting the expected output.

Can you please guide me if I am missing anything or it may be a bug in 12.0.10 build(12) ?

Thanks,

Ayush