Message: Could not retrieve the result of the job execution. This might be because a message was too large to process

When you log big amount of data like a collection or datatable it is a common behavour. Sometimes it happens even when not logging something but trace mode is enabled. Trace mode is actually another type of loggin so is pretty much the same as logging.If you have such problem, try to increase logging level for robot and try again, it worked for me.