apache https小程序android ssl error

宝塔面板中  web面板配置好后，配置中添加了如下内容：

SSLEngine on
SSLCertificateFile "D:\BtSoft\WebSoft\apache\conf\ssl\xxx.crt"
SSLCertificateKeyFile "D:\BtSoft\WebSoft\apache\conf\ssl\xxx.key"

//还需要添加下面这一句
SSLCertificateChainFile "D:\BtSoft\WebSoft\apache\conf\ssl\xxx_bind.crt"