[Galaxy S 5 Q&A, Help & Troubleshooting] bryplusan:
Just installed Android 6.0 and cm13

After adding Google account, contacts unfortunately crash while syncing. Your solutions are greatly appreciated. I tried installing Google contacts sync 7.0...still crashing though. Tried wiping cache in recovery mode...refreshed permissions...thank u for your time.

java.lang.RuntimeException: Unable to get provider com.google.android.syncadapters.contacts.ProxyGalProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.android.syncadapters.contacts.ProxyGalProvider" on path: DexPathList[[zip file "/data/app/com.google.android.syncadapters.contacts-2/base.apk"],nativeLibraryDirectories=[/data/app/com.google.android.syncadapters.contacts-2/lib/arm, /vendor/lib, /system/lib]]

at android.app.ActivityThread.installProvider(ActivityThread.java:5200)

at android.app.ActivityThread.installContentProviders(ActivityThread.java:4792)

at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4732)

at android.app.ActivityThread.-wrap1(ActivityThread.java)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1424)

at android.os.Handler.dispatchMessage(Handler.java:102)

at android.os.Looper.loop(Looper.java:148)

at android.app.ActivityThread.main(ActivityThread.java:5461)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.syncadapters.contacts.ProxyGalProvider" on path: DexPathList[[zip file "/data/app/com.google.android.syncadapters.contacts-2/base.apk"],nativeLibraryDirectories=[/data/app/com.google.android.syncadapters.contacts-2/lib/arm, /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 android.app.ActivityThread.installProvider(ActivityThread.java:5185)

... 10 more

Suppressed: java.io.IOException: Failed to open dex files from /data/app/com.google.android.syncadapters.contacts-2/base.apk

at dalvik.system.DexFile.openDexFileNative(Native Method)

at dalvik.system.DexFile.openDexFile(DexFile.java:295)

at dalvik.system.DexFile.<init>(DexFile.java:80)

at dalvik.system.DexFile.<init>(DexFile.java:59)

at dalvik.system.DexPathList.loadDexFile(DexPathList.java:279)

at dalvik.system.DexPathList.makePathElements(DexPathList.java:248)

at dalvik.system.DexPathList.<init>(DexPathList.java:120)

at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)

at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:65)

at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:58)

at android.app.LoadedApk.getClassLoader(LoadedApk.java:376)

at android.app.LoadedApk.makeApplication(LoadedApk.java:569)

at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4724)

... 8 more

Suppressed: java.lang.ClassNotFoundException: com.google.android.syncadapters.contacts.ProxyGalProvider

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)

... 12 more

Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available