html2canvas - not reading full URL Path - html2canvas

I'm running html2canvas in 2 different places within my sites structure.
When I use it to capture elements in the root of the site it works. ie, when run in http://192.168.0.1/test/ it works correctly.
However if I run it in http://192.168.0.1/test/**subfolder/** the canvas image is shown but no css or png files have been rendered in it.
Looking at the console html2cavnas is failing to load items from http://192.168.0.1/test/images/ or http://192.168.0.1/test/css/
But it should be looking in
http://192.168.0.1/test/**subfolder**/images/ or http://192.168.0.1/test/**subfolder**/css/
How do I get it to read the URL correctly ?
Thanks

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