This is an indicator that the temporary file used to store the results could not be created. You need to check the location of the temp file folder. For Apache Tomcat, this would be configured by CATALINA_TMPDIR and default location is apache-tomcat/temp.
The solution is to ensure this folder exists and the user associated with Tomcat has permissions to create files in that folder.
Related messages that may be seen related to this error:
pcf.sl.editors.msg.SaveMsgToFile - java.io.IOException: No such file or directory
Browser Debug window (F12)
ERROR TypeError: Cannot read property 'fileBytes' of undefined