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Developer technologies | .NET | Other
Microsoft Technologies based on the .NET software framework
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IISNode is no longer the recommend IIS node hosting option. The error typically means the IIS module can not communicate with the node exe. If the app has been running, check for node version upgrade (IISNode last update was in 2020 to support node 20), or a code change.
the recommend way to run node on IIS is via IIS ARR as a reverse proxy.