Problems when adding an address

[sidneylopes]

When I press the Add Address button, I have the following error:

Here is the part of the code that has "countries.find":

const country = countries.find(item => item.id === countryId);

How can I fix it (my app is only for Brazil)?

[sidneylopes]

I also just noticed that the error doesn't happen every time

[dimaportenko]

1. Can you share reproduce steps?
2. Are you using persist state?
3. If you don't a universal solution for any country configured from the Magento side, you can hardcode Brazil value.