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Plesk shows 503 Service Unavailable: iisnode.dll failed to load The data is the error




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    Win admins


    Client installed directly through RDP:
    1. node-v12.18.0-x64.msi
    2. iisnode-express-v0.2.21-x86.msi

    Plesk panel application pool crashed and all other websites application pool also crashed.

    Corrected by below steps and also installed Node.js using Plesk.

    "C:\Program Files\iisnode" Deny permission for users psaadm_users,psaadm and psacln, changed to "read and execute".
    "C:\Program Files (x86)\iisnode" Only read permission were found changed to Read and execute.

    Note: permission changes from RDP not from DiskSecurity.xml though had entered same content mentioned in this KB.

    Just want to know how this can be corrected as I have run Plesk reconfigurator for all possible option available.

    how to add both location with correct permission.

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  • Avatar
    Ivan Postnikov

    Hello Win admins


    Thank you for sharing your user experience!

    It may be useful for other Pleskians.

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