I am getting a similar error as people are getting when there is a version issue between PDI and BI Server when trying to execute a PDI job from the BI Server.

Error: Kettle.ERROR_0015 - Could not load transformation transformation-file from resource null - java.lang.NullPointerException (org.pentaho.platform.plugin.action.kettle.KettleComponent)

PDI version = 3.1.0
BI Version = 3.0

Based on these versions - I didn't expect to see an issue, but I could be wrong. Does anyone have any thoughts on this?