无法解析配置 [自定义配置] 的所有依赖项

Could not resolve all dependencies for configuration [custom configuration]

拜托,我正在将 gradle 2.1 项目转换为 6.0,但出现此错误。

Could not resolve all dependencies for configuration ':driver'.
> Cannot convert the provided notation to a File or URI: classesDirs.
 The following types/formats are supported:
   - A String or CharSequence path, for example 'src/main/java' or '/usr/include'.
   - A String or CharSequence URI, for example 'file:/usr/include'.
   - A File instance.
   - A Path instance.
   - A Directory instance.
   - A RegularFile instance.
   - A URI or URL instance.

当运行

configurations.driver.each {File file ->
    loader.addURL(file.toURL())
}

驱动程序是定义为

的自定义配置
configurations {
    driver
}

dependencies {
    driver 'org.drizzle.jdbc:drizzle-jdbc:1.3'
}

请问如何解决?

使用

修复
sourceSets.main.output.resourcesDir = sourceSets.main.java.outputDir
sourceSets.test.output.resourcesDir = sourceSets.test.java.outputDir

而不是

sourceSets.main.output.resourcesDir = sourceSets.main.output.classesDirs
sourceSets.test.output.resourcesDir= sourceSets.test.output.classesDirs