Error during importing bugzilla project in Jira.

[Shiva Prasad Rudrappa Hattaraki]

While importing Projects the page is keep on loading and it is popping up message like page is not responding.

I i got the following error in logs.

2020-02-08 20:21:01,788 http-nio-8080-exec-137 ERROR shivaprasad.h 1220x43824x2 16yokcd 172.27.155.253,10.102.5.130 /secure/admin/ImporterProjectMappingsPage!default.jspa [c.o.scriptrunner.fragments.ScriptCondition] Script condition failed:
java.lang.NullPointerException: Cannot get property 'priority' on null object
at Inline1212850300.run(Inline1212850300.groovy:1)
at Inline1212850300$run.call(Unknown Source)
at com.onresolve.scriptrunner.fragments.ScriptCondition.shouldDisplay(ScriptCondition.groovy:52)