[WPML Multilingual & Multicurrency for WooCommerce - Standalone Version] Stripe Payment gatewat not available in the second currency

Overview of the issue

If you are using WPML Multilingual & Multicurrency for WooCommerce and its standalone mode with Stripe as your payment gateway, you may encounter issues when attempting to make payments in a secondary currency. Specifically, the Stripe payment gateway may not be available during checkout in the secondary currency if it is not set.

Workaround

Please, make sure of having a full backup of your site before proceeding.

• Open …/wp-content/plugins/woocommerce-multilingual/classes/multi-currency/payment-gateways/class-wcml-payment-gateway-stripe.php file.
• Look for line 78.
• Change:

  		if ( $gateway_settings && isset( $gateway_settings[ $client_currency ] ) ) {
  			$gateway_setting = $gateway_settings[ $client_currency ];
  			if ( isset( $gateway_setting['publishable_key'] ) && isset( $gateway_setting['secret_key'] ) ) {
  				$settings['publishable_key'] = $gateway_setting['publishable_key'];
  				$settings['secret_key']      = $gateway_setting['secret_key'];
  			}
  			if ( isset( $gateway_setting['test_publishable_key'] ) && isset( $gateway_setting['test_secret_key'] ) ) {
  				$settings['test_publishable_key'] = $gateway_setting['test_publishable_key'];
  				$settings['test_secret_key']      = $gateway_setting['test_secret_key'];
  			}
  		}
  

• For:

  		if ( $gateway_settings && isset( $gateway_settings[ $client_currency ] ) ) {
  			$gateway_setting = $gateway_settings[ $client_currency ];
  			if ( ! empty( $gateway_setting['publishable_key'] ) && ! empty( $gateway_setting['secret_key'] ) ) {
  				$settings['publishable_key'] = $gateway_setting['publishable_key'];
  				$settings['secret_key']      = $gateway_setting['secret_key'];
  			}
  			if ( ! empty( $gateway_setting['test_publishable_key'] ) && ! empty( $gateway_setting['test_secret_key'] ) ) {
  				$settings['test_publishable_key'] = $gateway_setting['test_publishable_key'];
  				$settings['test_secret_key']      = $gateway_setting['test_secret_key'];
  			}
  		}