Could not resolve all artifacts for configuration ':classpath'. & Could not resolve ly.img.android.pesdk:plugin:6.2.7.

[arihidayatmaulana]

Required by:
project :
> Could not resolve ly.img.android.pesdk:plugin:6.2.7.
> Could not get resource 'https://artifactory.9elements.com/artifactory/imgly/ly/img/android/pesdk/plugin/6.2.7/plugin-6.2.7.pom'.
> Could not GET 'https://artifactory.9elements.com/artifactory/imgly/ly/img/android/pesdk/plugin/6.2.7/plugin-6.2.7.pom'.
> sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: validity check failed