Export of BPMN model as .bpmn errored with "Unable to Read Transformation profile"

We are trying to export BPMN model in .bpmn format, we are getting an error while saving the file to the disk.

The Error says: 

Transformation Failed

Unable to read transformation profile.

java.lang.NullPointerException

at com.aris.modeling.server.bl.logic.mtexecution.manager.ATransformationManager.getTransformation(ATransformationManager.java:114)

at com.aris.modeling.server.bl.logic.mtexecution.ATransformationController$TransformationExecutionCommand.loadTransformation(ATransformationController.java:600)

at com.aris.modeling.server.bl.logic.mtexecution.ATransformationController$TransformationExecutionCommand.invoke(ATransformationController.java:318)

at com.aris.modeling.server.bl.logic.mtexecution.ATransformationController.executeTransformationImpl(ATransformationController.java:171)

at com.aris.modeling.server.bl.logic.mtexecution.ATransformationController.executeTransformation(ATransformationController.java:128)

at com.aris.modeling.server.bl.components.mtexecution.AMTExecutionAction.run(AMTExecutionAction.java:102)

at com.aris.modeling.server.common.progress.AServerTaskRunnable.run(AServerTaskRunnable.java:29)

at java.lang.Thread.run(Thread.java:748)