AI2 companion for my apps stops suddenly without any error message

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Is it just that block that I need to change?

How to display new data from a spreadsheet column in MIT App Inventor if there are empty values ​​when the old data has been deleted. displays data that only has values. i need to display the distance value. The value is not displayed because there is empty data in column G. can u show me the block how fix it?

See AI2 companion for my apps stops suddenly without any error message - #37 by ABG