Fatal error: Uncaught Error: Interface 'WPMailSMTP\Vendor\Psr\Http\Message\StreamInterface' not found in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\wp-mail-smtp\vendor_prefixed\guzzlehttp\psr7\src\InflateStream.php:18 Stack trace: #0 {main} thrown in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\wp-mail-smtp\vendor_prefixed\guzzlehttp\psr7\src\InflateStream.php on line 18