离线打包遇到缺包的问题java.lang.ClassNotFoundException: io.dcloud.feature.ad.AdFeature

W/System.err: java.lang.ClassNotFoundException: io.dcloud.feature.ad.AdFeature
W/System.err: at java.lang.Class.classForName(Native Method)
W/System.err: at java.lang.Class.forName(Class.java:309)
W/System.err: at java.lang.Class.forName(Class.java:273)
W/System.err: at io.dcloud.AdMgr.hasAdService(AdMgr.java:50)
W/System.err: at io.dcloud.AdMgr.a(AdMgr.java:30)
W/System.err: at io.dcloud.AdMgr.onCreateAdSplash(AdMgr.java:58)
W/System.err: at io.dcloud.WebAppActivity.a(WebAppActivity.java:300)
W/System.err: at io.dcloud.WebAppActivity.onCreateSplash(WebAppActivity.java:290)
W/System.err: at io.dcloud.a.onCreate(BaseActivity.java:58)
W/System.err: at io.dcloud.WebAppActivity.onCreate(WebAppActivity.java:117)
W/System.err: at android.app.Activity.performCreate(Activity.java:6161)
W/System.err: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)
W/System.err: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2507)
W/System.err: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2640)
W/System.err: at android.app.ActivityThread.access$800(ActivityThread.java:182)
W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1493)
W/System.err: at android.os.Handler.dispatchMessage(Handler.java:111)
W/System.err: at android.os.Looper.loop(Looper.java:194)
W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5682)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:963)
W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)
W/System.err: Caused by: java.lang.ClassNotFoundException: Didn't find class "io.dcloud.feature.ad.AdFeature" on path: DexPathList[[zip file "/data/app/io.dcloud.HBuilder.Hello-2/base.apk"],nativeLibraryDirectories=[/data/app/io.dcloud.HBuilder.Hello-2/lib/arm64, /vendor/lib64, /system/lib64]]
W/System.err: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
W/System.err: at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
W/System.err: at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
W/System.err: ... 23 more
W/System.err: Suppressed: java.lang.ClassNotFoundException: io.dcloud.feature.ad.AdFeature
W/System.err: at java.lang.Class.classForName(Native Method)
W/System.err: at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
W/System.err: at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
W/System.err: at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
W/System.err: ... 24 more
W/System.err: Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

什么情况？