PDF Label generation fails

2023-05-26T08:19:35.083Z [debug]: http://ovm-icat2:8080/icat/entityManager?sessionId=***&query=select distinct investigation from Investigation investigation JOIN investigation.investigationInstruments investigationInstruments JOIN investigationInstruments.instrument instrument   WHERE  investigation.id = '1076345701'  order by investigation.startDate DESC  include investigation.type type, investigation.investigationInstruments investigationInstruments, investigationInstruments.instrument instrument, investigation.parameters p, p.type  LIMIT 0, 10000  
  
2023-05-26T08:19:35.187Z [debug]: PDF has not been sent 
  				 error : TypeError: Cannot read property '0' of undefined