i need try to add link new line via api resoltion  but HTML format not correct

i try using  \n  to  https://pitstop.manageengine.com/portal/community/topic/add-multiline-resolution-via-api  

but always receive that issue

<message> Error when performing - ADD_RESOLUTION - XML document structures must start and end within the same entity. </message>

if use single text file no have issues.

my request are format for example

https://myserver/sdpapi/request/3534343/resolution/?OPERATION_NAME=ADD_RESOLUTION&TECHNICIAN_KEY=xxxxx&INPUT_DATA=<Details><resolution><resolutiontext> test1&lt;/br&gt;atest 2</resolutiontext></resolution></Details>