Unable to add Software Licenses in ServiceDesk+

Unable to add Software Licenses in ServiceDesk+

Hi.
 
We're using ServiceDesk+ 7.6.0 build 7611.  I'm trying to add a new software license in the Assets section but when adding the product name I get this error:
 
FAILURE :null

Please report the problem to the system administrator, with the Error Code - 1,293,716,205,584

 
Then when I try to add the details it just doesn't do anything.  Has anyone else experienced this, or know what the error code means?
 
Thanks,
Dave
 
 
Screenshot of error:
 

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