Can not find class error

[lenmoyouziJiangjun]

Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v7/graphics/Palette;
at com.adobe.creativesdk.aviary.async_tasks.AdobeImageDownloadAsyncTask.doInBackground(AdobeImageDownloadAsyncTask.java:126)
at com.adobe.creativesdk.aviary.async_tasks.AdobeImageDownloadAsyncTask.doInBackground(AdobeImageDownloadAsyncTask.java:23)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
at java.lang.Thread.run(Thread.java:818) 
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.graphics.Palette" on path: DexPathList[[zip file "/data/app/com.mcttechnology.childfolio-2/base.apk"],nativeLibraryDirectories=[/data/app/com.mcttechnology.childfolio-2/lib/x86, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.adobe.creativesdk.aviary.async_tasks.AdobeImageDownloadAsyncTask.doInBackground(AdobeImageDownloadAsyncTask.java:126) 
at com.adobe.creativesdk.aviary.async_tasks.AdobeImageDownloadAsyncTask.doInBackground(AdobeImageDownloadAsyncTask.java:23) 
at android.os.AsyncTask$2.call(AsyncTask.java:292) 
at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
at java.lang.Thread.run(Thread.java:818) 
Suppressed: java.lang.ClassNotFoundException: android.support.v7.graphics.Palette
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 8 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available