Rider 2026.2.0.1 Codex install failure

Hello,

I installed Rider 2026.2.0.1 and codex fails to install now with:
2026-08-02 12:52:38,500 [  41599]   WARN - #c.i.m.l.a.a.r.AcpRuntimeManager - Failed to promote staged install C:\Users\myuser\AppData\Local\JetBrains\Rider2026.2\acp-agents\.runtimes\node\24.13.0.incomplete -> C:\Users\myuser\AppData\Local\JetBrains\Rider2026.2\acp-agents\.runtimes\node\24.13.0
java.nio.file.AccessDeniedException: C:\Users\myuser\AppData\Local\JetBrains\Rider2026.2\acp-agents\.runtimes\node\24.13.0.incomplete -> C:\Users\myuser\AppData\Local\JetBrains\Rider2026.2\acp-agents\.runtimes\node\24.13.0
    at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:91)
    at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:106)
    at java.base/sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:310)
    at java.base/sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:287)
    at com.intellij.platform.core.nio.fs.TracingFileSystemProvider.move(TracingFileSystemProvider.java:170)
    at java.base/java.nio.file.Files.move(Files.java:1319)
    at com.intellij.ml.llm.agents.acp.registry.AcpRuntimeManager$Companion.promoteStagedInstall$intellij_ml_llm_agents_acp(AcpRuntimeManager.kt:222)
    at com.intellij.ml.llm.agents.acp.registry.AcpRuntimeManager$RuntimeType$Npx$downloadRuntime$2.invokeSuspend(AcpRuntimeManager.kt:468)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
    at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
    at kotlinx.coroutines.internal.SoftLimitedDispatcher$Worker.run(SoftLimitedDispatcher.kt:130)
    at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
    at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:610)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:1188)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:775)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:762)

I deleted the runtime acp folder, restarted rider, same result. I ran rider with admin priviliges, same result. Anyone else that has the same issue?
 

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2 comments

Same issue with Rider 2026.2.0.2 today.

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Somehow, it resolved itself. After may tries.

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