Could not load file or assembly 'UiPath.Excel, Version=2.17.0.0, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified

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Try first to upgrade all dependencies to the latest version in the project.
Close Studio.
Go to the folder where the packages are downloaded → %userprofile%\.nuget and rename the packages folder to packages_backup.
Reopen the Main.xaml or project.json in UiPath Studio.

Let us knot if this helped.