I have Notepad++ and I got some XML code which is very long. When I pasted it in Notepad++ there was a long line of code (difficult to read and work with).
I want to
Since I see lots of comments about people having problems with the plugin, I thought I'd mention the work around that I use.
I just use one of the online sites for XML viewing (I use https://codebeautify.org/xmlviewer, but there are plenty out there) as follows:
I don't know if it qualifies as answering the OP's question exactly, but it's very simple and easy for anyone who is having problems with the plugin.