Change log message

1 files changed, 3 insertions, 2 deletions

diff --git a/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/DokkaTask.kt b/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/DokkaTask.kt
index 0d191d9a..7d8fd309 100644
--- a/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/DokkaTask.kt
+++ b/runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/DokkaTask.kt
@@ -206,8 +206,9 @@ open class DokkaTask : DefaultTask() {
                 subProjects.toProjects().fold(baseConfig, { list, project ->
                     listOf(mergeUserConfigurationAndPlatformData(list.first(), ConfigurationExtractor.extractFromSinglePlatform(project)!!))
                 })
-            } catch(e: NoClassDefFoundError) {
-                logger.warn("Cannot extract sources from subProjects. Please update Kotlin plugin to version 1.3.30+")
+            } catch(e: NullPointerException) {
+                logger.warn("Cannot extract sources from subProjects. Do you have the Kotlin plugin in version 1.3.30+ " +
+                        "and the Kotlin plugin applied in the root project?")
                 baseConfig
             }
         } else {