问Android 4.4设备glide 加载微信二维码，出现ssl异常，为啥？

https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQHs7zwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyb0Vud2xtVkZkckcxVmRlSXhEYy0AAgTNPOtnAwSAUQEA 加载微信图片出现ssl javax.net.ssl.SSLHandshakeException(java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.),这是为什么？