java.lang.NullPointerException Error When Enrolling in Offering

Summary:

java.lang.NullPointerException Error being experienced by subset of learners when attempting to enroll in an offering.

Content (required):

We have several courses where a subset of learners are experiencing an error message of "java.lang.NullPointerException" when attempting to enroll in an offering. The current workaround is to assign them at the offering level when this error is encountered, but we're trying to better understand why this is occurring. The content is a SCORM 1.2 file and those experiencing the error message appear to be in a similar geographical area for our organization. Trying to define if this is a: