WechatOpenSDK缺少符号arm64，无法编译通过？

使用了最新版本1.8.7.1。xcode 11.4.1。就报如下错误：

Undefined symbols for architecture arm64:

  “_OBJC_CLASS_$_WKWebView”, referenced from:

      objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)

  “_OBJC_CLASS_$_WKWebViewConfiguration”, referenced from:

      objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)

ld: symbol(s) not found for architecture arm64

pod 集成还老是报找不到服务器。脑阔疼！