Attempt to de-reference a null object : (zqu) An unexpected error has occurred.

[SaiNiveditha]

When User is trying to send a Quote  to Zuora, the following error occurs 

Attempt to de-reference a null object : (zqu) 
An unexpected error has occurred. Your solution provider has been notified. (zqu)

[SaiNiveditha · Accepted solution]

On checking the  Related Product in Zuora it had only the Currency AUD in all rate plans even for currency GBP.

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On fixing the currency in Zuora right for this bundle Product and on creating a quote it worked and error was resolved.