Exception when starting Intellij IDEA: Unexpected licensing exception

Issues
1

I’m unable to use the plugin. As soon as IDEA boots the following exception occurs.

BaseException: Unexpected licensing exception
at com.diffblue.cover.r.b.f.run(SourceFile:196)
at com.diffblue.cover.sandbox.execution.SafeExecutor.run(SourceFile:27)
at com.diffblue.cover.r.b.d.e(SourceFile:564)
at com.diffblue.cover.r.b.i.e(SourceFile:49)
at com.diffblue.cover.r.b.d.f(SourceFile:495)
at com.diffblue.cover.r.b.i.f(SourceFile:49)
at com.diffblue.cover.r.b.d.m(SourceFile:450)
at com.diffblue.cover.r.b.d.a(SourceFile:201)
at com.diffblue.cover.r.b.f.run(SourceFile:179)
at com.diffblue.cover.sandbox.execution.SafeExecutor.run(SourceFile:27)
at com.diffblue.cover.r.b.d.a(SourceFile:172)
at com.diffblue.cover.r.b.i.a(SourceFile:138)
at com.diffblue.cover.r.b.i.a(SourceFile:98)
at com.diffblue.intellij.plugin.license.d.a(SourceFile:84)
at com.diffblue.intellij.plugin.telemetry.TelemetryService.getErrorReporter(SourceFile:394)
at com.diffblue.intellij.plugin.license.f.a(SourceFile:1162)
at com.diffblue.intellij.plugin.startup.ActionRegistry.a(SourceFile:108)
at com.diffblue.intellij.plugin.startup.ActionRegistry.runActivity(SourceFile:64)
at com.intellij.ide.startup.impl.StartupManagerImpl.runOldActivity(StartupManagerImpl.kt:359)
at com.intellij.ide.startup.impl.StartupManagerImpl.doRunPostStartupActivities(StartupManagerImpl.kt:313)
at com.intellij.ide.startup.impl.StartupManagerImpl.access$doRunPostStartupActivities(StartupManagerImpl.kt:72)
at com.intellij.ide.startup.impl.StartupManagerImpl$runPostStartupActivities$3$2.invokeSuspend(StartupManagerImpl.kt:210)
at com.intellij.ide.startup.impl.StartupManagerImpl$runPostStartupActivities$3$2.invoke(StartupManagerImpl.kt)
at com.intellij.ide.startup.impl.StartupManagerImpl$runPostStartupActivities$3$2.invoke(StartupManagerImpl.kt)
at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:44)
at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext(Builders.common.kt:166)
at kotlinx.coroutines.BuildersKt.withContext(Unknown Source)
at com.intellij.ide.startup.impl.StartupManagerImpl$runPostStartupActivities$3.invokeSuspend(StartupManagerImpl.kt:209)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
at kotlinx.coroutines.UndispatchedCoroutine.afterResume(CoroutineContext.kt:277)
at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:101)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:47)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:610)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runDefaultDispatcherTask(CoroutineScheduler.kt:1194)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:906)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:775)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:762)

2

Hello, I am sorry to hear that.

I will investigate further, what version of the IntelliJ IDE and Diffblue Plugin are you using?

While it is not clear from the stack trace alone, issues such as this can sometimes be related to networking issues with commercial firewalls. A good place to start would be to look at Online license activation | Diffblue Documentation and potentially try connecting via a different network.

3

Hi,

IDEA 2025.3.3, Diffblue plugin 2026.02.02-2025.3

I’ve tried disabling my laptop’s antivirus and VPN and am not behind a proxy or corporate firewall.

4

Hi

Would you be able to email us at support@diffblue.com using the email address associated with your license key. We have identified an ongoing issue with our license creation process.

I will need to re-create a license key for you and will then email that directly to you for you to use.