Ruby error

[Rukuma]

How to fix ruby console error?
While opening my skp file it shows this message

Error Loading File C:/ProgramData/ASGVIS/VfS/Ruby/R2P.rb
Error: #<TypeError: no implicit conversion of nil into String>
C:/ProgramData/ASGVIS/VfS/Ruby/XmlHelpers.rb:274:in initialize' C:/ProgramData/ASGVIS/VfS/Ruby/XmlHelpers.rb:274:in new'
C:/ProgramData/ASGVIS/VfS/Ruby/XmlHelpers.rb:274:in replace_parameter_in_xml_node' C:/ProgramData/ASGVIS/VfS/Ruby/VfSExport.rb:572:in light_to_xml'
C:/ProgramData/ASGVIS/VfS/Ruby/R2P.rb:1277:in block in get_updated_light_xml' C:/ProgramData/ASGVIS/VfS/Ruby/R2P.rb:1272:in each'
C:/ProgramData/ASGVIS/VfS/Ruby/R2P.rb:1272:in get_updated_light_xml' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:452:in _add'
C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:536:in addNodeForEnt' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in block in mapEntities'
C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in each' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in grep'
C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in mapEntities' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:538:in addNodeForEnt'
C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in block in mapEntities' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in each'
C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in grep' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:468:in mapEntities'
C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:486:in mapSceneToTree' C:/ProgramData/ASGVIS/VfS/Ruby/VfSObservers.rb:1053:in onOpenModel'
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