90057 Error for currency issue

Hi,
I have a problem importing products via feeds from Woocoommerce.
Once the feed request is finished, logs sayed that I have imported USD as currency instead of ERU, although the euro has been configured as default currency on Woocommerce.

This error is reported:

90057 Error The Currency field contains an invalid value: $. To correct this error, choose from the valid set of values.

The topic below is incomplete and doesn’t return a solution:
https://sellercentral.amazon.com/forums/t/the-message-price-standardprice-currency-field-contains-an-invalid-value/201214?lang=it

Thank you.