[#8626] - Unexpected Error contact administrator in Jasper admin console

Hi
Getting an 'Unexpected error, contact your administrator' error while generating a job which loads data from postgresql table to another database.
The same job I can run on my Local JETL successfully. Then I tried to add as a normal task in JAC Job conductor and try to Generate first ( Execution Server as Local). Its throwing an error 'Unexpected error, contact your administrator' in Jasper Admin Console.

Can anybody help me with a solution/suggestion?

Thanks