Error while accessing classes stored in subfolder "unable to resolve class groovy.util.utilHelper"

[Shivashankar Boloor Prakash]

Hi,

Im facing an Issue accessing .groovy classes from another class. when I import the classes I get an error
"unable to resolve class groovy.util.utilHelper"

There are a set of utility .groovy classes that is stored in (jira_home/scripts/groovy/util) directory where as main class reside in (jira_home/scripts).
This setup was working fine till I updated both JIRA and Scriptrunner.

I have checked the Jira_home dir path, it is fine.

Version of JIRA7.12.1

Version of ScriptRunner 5.4.30