Multi-currency for Gravity Forms (MCG) - allow functioning without OpenExchangeRates API.

functions.php

<?php
/**
 * Multi-currency for Gravity Forms - allow without OpenExchangeRates API.
 */
function gf_multi_currency_allow_without_exchange_rates_api() {
	?>
	<script>
		if ( gform?.addFilter ) {
			gform.addFilter( 'idea_mcg_exchange_rates', function() {
				return {
					rates: true,
				}
			} );
		}
	</script>
	<?php
}

add_action( 'wp_head', 'gf_multi_currency_allow_without_exchange_rates_api' );