The https://services.gradle.org/ certificate seems to be confused .
As a temporary temporary, you can download the gradle shell via http instead of https. To do this, you need to change the configuration of the Grails shell. I edited build.gradle
task wrapper(type: Wrapper) { gradleVersion = gradleWrapperVersion distributionUrl = 'http://services.gradle.org/distributions/gradle-2.3-bin.zip' }
Then generated it by running the command: gradle wrapper
After that, grails run-app should work.
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