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kotlinlang

In my mpp − targeting only jvm and js, _not_ native! − I cannot upgrade to kotlin 1.3.20. Gradle reports an SSLHandshakeException: _unable to find valid certification path to requested target_. I find these two lines among the red lines of output:
```Caused by: org.gradle.api.resources.ResourceException: Could not get resource '<https://plugins.gradle.org/m2/org/jetbrains/kotlin/kotlin-native-utils/1.3.20/kotlin-native-utils-1.3.20.pom>'.
Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not HEAD '<https://repo.jfrog.org/artifactory/libs-release-bintray/org/jetbrains/kotlin/kotlin-native-utils/1.3.20/kotlin-native-utils-1.3.20.pom?referrer>'.
```
Is this an error on my side or on the server side?