gistfile1.txt

~/D/react-native    ./gradlew :ReactAndroid:tasks                                                                                    9.3s  Tue 26 Nov 14:58:29 2019

 FAILURE: Build completed with 2 failures.

 1: Task failed with an exception.
 -----------
 * Where:
 Build file '/Users/realpassy/Downloads/react-native/ReactAndroid/build.gradle' line: 101

 * What went wrong:
 A problem occurred evaluating project ':ReactAndroid'.
 > Could not find matching constructor for: org.gradle.api.GradleScriptException(String)

 * Try:
 Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
 ==============================================================================

 2: Task failed with an exception.
 -----------
 * What went wrong:
 A problem occurred configuring project ':ReactAndroid'.
 > compileSdkVersion is not specified.

 * Try:
 Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
 ==============================================================================

 * Get more help at https://help.gradle.org

 Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
 Use '--warning-mode all' to show the individual deprecation warnings.
 See https://docs.gradle.org/6.0.1/userguide/command_line_interface.html#sec:command_line_warnings

 BUILD FAILED in 576ms

Did you ever find a resolution for this? I'm facing the same issue and haven't been able to figure out how to proceed.