Index: src/bp-groups/screens/single/request-membership.php
===================================================================
--- src/bp-groups/screens/single/request-membership.php
+++ src/bp-groups/screens/single/request-membership.php
@@ -38,7 +38,7 @@
 		if ( !check_admin_referer( 'groups_request_membership' ) )
 			return false;
 
-		if ( !groups_send_membership_request( bp_loggedin_user_id(), $bp->groups->current_group->id ) ) {
+		if ( !groups_send_membership_request( [ 'user_id' => bp_loggedin_user_id(), 'group_id' => $bp->groups->current_group->id ] ) ) {
 			bp_core_add_message( __( 'There was an error sending your group membership request. Please try again.', 'buddypress' ), 'error' );
 		} else {
 			bp_core_add_message( __( 'Your membership request was sent to the group administrator successfully. You will be notified when the group administrator responds to your request.', 'buddypress' ) );
Index: src/bp-templates/bp-legacy/buddypress-functions.php
===================================================================
--- src/bp-templates/bp-legacy/buddypress-functions.php
+++ src/bp-templates/bp-legacy/buddypress-functions.php
@@ -1582,7 +1582,7 @@
 		case 'request_membership' :
 			check_ajax_referer( 'groups_request_membership' );
 
-			if ( ! groups_send_membership_request( bp_loggedin_user_id(), $group->id ) ) {
+			if ( ! groups_send_membership_request( [ 'user_id' => bp_loggedin_user_id(), 'group_id' => $group->id ] ) ) {
 				_e( 'Error requesting membership', 'buddypress' );
 			} else {
 				echo '<a id="group-' . esc_attr( $group->id ) . '" class="group-button disabled pending membership-requested" rel="membership-requested" href="' . bp_get_group_permalink( $group ) . '">' . __( 'Request Sent', 'buddypress' ) . '</a>';
Index: src/bp-templates/bp-nouveau/includes/groups/ajax.php
===================================================================
--- src/bp-templates/bp-nouveau/includes/groups/ajax.php
+++ src/bp-templates/bp-nouveau/includes/groups/ajax.php
@@ -189,7 +189,7 @@
 			break;
 
 			case 'groups_request_membership' :
-				if ( ! groups_send_membership_request( bp_loggedin_user_id(), $group->id ) ) {
+				if ( ! groups_send_membership_request( [ 'user_id' => bp_loggedin_user_id(), 'group_id' => $group->id ] ) ) {
 					$response = array(
 						'feedback' => sprintf(
 							'<div class="bp-feedback error"><span class="bp-icon" aria-hidden="true"></span><p>%s</p></div>',