Error in business logic code

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While executing page http://www.best.eu.org/student/career/viewOffer.jsp

java.lang.NullPointerException
	at org.eu.best.website.student.CareerViewOfferLogic.checkAttributes(Unknown Source)

Makumba developer support; version:0.9.7-SNAPSHOT - 2021-01-28_0049_25 dataSource:production host:localhost path:/var/lib/tomcat7