[ArgumentError] unknown encoding name - uft-8

Created by: ashrav

Scan is aborting and giving error message:

[2016-01-19 03:00:27 -0500] [ArgumentError] unknown encoding name - uft-8
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:615:in `find'
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:615:in `serialize'
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:774:in `to_format'
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node.rb:630:in `to_html'
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/arachni-1.3.2/lib/arachni/element/form.rb:294:in `from_node'
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/arachni-1.3.2/lib/arachni/element/form.rb:279:in `block in from_document'
[2016-01-19 03:00:27 -0500] /home/xxx/tools/arachni-1.3.2-0.5.9/system/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:187:in `block in each'