Error saying addressbook is not valid when downloading excel

[nus-se-bot]

Steps to recreate:

1. Download in folder
2. Open the file
3. Try to save again
4. Error message pops up

Expected behavior: Message says excel is currently open rather than addressbook is invalid

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_{[original: nus-cs2103-AY2122S1/pe-interim#5831] [original labels: severity.Low type.FunctionalityBug]}

[luayida99]

Team's Response

This issue is more about the error message phrasing, we don't think there is a functionality bug since it does not affect normal operation. The error message displayed does not say that addressbook.json is invalid per the title. Thanks for pointing it out though

Duplicate status (if any):

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