> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/gateway/fr/knowledge-base/troubleshooting-articles/devolutions-gateway-side-by-side-installation-method-not-found.md).

# Méthode d'installation côte à côte de Devolutions Gateway introuvable

Lors de l'installation de Devolutions Gateway sur la même machine que Devolutions Server (installation côte à côte), cette erreur peut apparaître dans les journaux d'installation.

Method not found:'Void System.Management.Automation.Runspaces.InitialSessionState.set\_ExecutionPolicy(Microsoft.PowerShell.ExecutionPolicy)'.

### Solution

Devolutions Gateway nécessite au minimum PowerShell version 5.1. Veuillez mettre à jour PowerShell vers cette version pour résoudre le problème, puis recommencez l'installation de Devolutions Gateway.


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