How to fix Failed resolution of: Landroid/support/design/R$attr

Open Source Development Extension Development
1

java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/design/R$attr;
Note: You will not see another error reported for 5 seconds.

Sir can you help me I got this error in runtime.
I am using AndroidMaterialSupport library jar and aar file and I am using extension template on github and I am also using proguard there.

2

In extensions aar files wont work.

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