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Jonathan SpinkJonathan Spink 

LWC giving 'Component Error'

A LWC which was last updated 2 years ago has suddenly generated a 'Component Error': "Error during LWC component connect phase: [Cannot read properties of undefined (reading 'length')]" What is this about?
AbhinavAbhinav (Salesforce Developers) 
Its very hard to tell reason with just that error message.Please insepect it on browser.
Jonathan SpinkJonathan Spink
Will do. I noticed that the error wasn't raised on a different record so may be data-related.