can't generate Signed Apk (release ver)

[Martin102000]

hi i'm using last version of android studio and last version of blackobfs ASP (3.7)

this only happens with relase ver. with debug mode it works fine

this is the build log
LogBLACK.txt

[nnjun]

Step 1. Configure your build.gradle (in top level directory)
repositories {
...
maven { url 'https://jitpack.io' }
}
dependencies {
...
classpath "com.github.CodingGay:BlackObfuscator-ASPlugin:3.7"
}

[Martin102000]

yes. i already had that in my build config!

anyway.. the same error appears.
this is my build.gradle

[Martin102000]

[nnjun]

Try to avoid unimportant classes

[Martin102000]

that isn't the problem because I'm just having trouble with Signed version. in Debug apk everything works fine!