Deprecated: Return type of Nexmo\Call\Unearmuff::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/trombino/public_html/africa.trombino.org/vendor_new/nexmo/client/src/Call/Unearmuff.php on line 14