So, it says this -
* What went wrong:
Problem configuring task :runClient from command line.
> Unknown command-line option '--sacktrace'.
* Try:
Run gradlew help --task :runClient to get task usage details. 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 5.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/4.9/userguide/command_line_interface.html#sec:command_line_warnings
BUILD FAILED in 1s