# Pastebin MGLADVfG
Uncaught TypeError: Cannot read property 'concat' of undefined
    at Server.getInstrumentRelationshipAttrInfo (userscript.html?id=c54ffef7-a4ea-4a7c-a196-3a4e15d960da:329)
    at setInstrument (userscript.html?id=c54ffef7-a4ea-4a7c-a196-3a4e15d960da:741)
    at HTMLInputElement.eval (userscript.html?id=c54ffef7-a4ea-4a7c-a196-3a4e15d960da:794)
    at HTMLInputElement.r (common-chunks-bb7b70c.js:60)