Uncaught TypeError: Cannot read properties of null (reading 'toLowerCase')

[missinglink]

node
Welcome to Node.js v21.7.3.
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> const locale = require('locale-codes')
undefined

> locale.where('iso639-1', 'en')
Uncaught TypeError: Cannot read properties of null (reading 'toLowerCase')
    at /Users/peter/code/missinglink/places/node_modules/locale-codes/index.js:51:42
    at Array.find (<anonymous>)
    at Object.where (/Users/peter/code/missinglink/places/node_modules/locale-codes/index.js:51:13)

[Shatlyk1011]

I changed locally the line you changed, but the error still remains.