サポートライブラリを26.0.1にアップデートした後、Progaurdが失敗しました

Question

サポートライブラリを26.0.1にアップデートしましたが、リリースビルドに失敗しました。 ログ

Note: there were 3 references to unknown classes. 
     You should check your configuration for typos. 
     (http://proguard.sourceforge.net/manual/troubleshooting.html#unknownclass) 
Note: there were 63 unkept descriptor classes in kept class members. 
     You should consider explicitly keeping the mentioned classes 
     (using '-keep'). 
     (http://proguard.sourceforge.net/manual/troubleshooting.html#descriptorclass) 
Note: there were 29 unresolved dynamic references to classes or interfaces. 
     You should check if you need to specify additional program jars. 
     (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclass) 
Note: there were 1 class casts of dynamically created class instances. 
     You might consider explicitly keeping the mentioned classes and/or 
     their implementations (using '-keep'). 
     (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclasscast) 
Warning: there were 30 unresolved references to classes or interfaces. 
     You may need to add missing library jars or update their versions. 
     If your code works fine without the missing classes, you can suppress 
     the warnings with '-dontwarn' options. 
     (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass) 
Warning: there were 1 unresolved references to program class members. 
     Your input classes appear to be inconsistent. 
     You may need to recompile the code. 
      :purplleAndroid:transformClassesAndResourcesWithProguardForRelease FAILED 

ライブラリプロガードが失敗しているために理解できません。

progaurd file

app level build.gradle

Error log

Answer 1

それは私がライブラリーと呼ばれるbranch.ioを使用してライブラリの問題、 をサポートしていない、私はそれが更新されますので。 "+" との依存関係終わりだと付け加えていますいくつかのプロガードルールがあります。