我正在尝试在flutter项目中添加一个图标，我正在将android studio与iOS模拟器配合使用， 在寻找解决方案时，我发现这是在字体上发生的，但是，我不知道该如何解决图标的问题，并且在下面出现此错误！
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:468)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1340)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1315)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:264)
at com.mytest.TestApplication.httpclient.Request.call(Request.java:143)
at com.mytest.TestApplication.httpclient.Request.call(Request.java:37)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
这是我的代码。
[VERBOSE-2:FontFamily.cpp(184)] Could not get cmap table size!
[VERBOSE-3:FontCollection.cpp(95)] nTypefaces == 0
谢谢！