Could not load file or assembly 'Microsoft.Windows.Design.Extensibility, Version=4.3.1.0, Culture=neutral

[Manju_Reddy_Kanughula]

[mosa_sleeman (Mousa Suleiman)]

Hello @Manju_Reddy_Kanughula
May we know what you are trying to do? where you encountered with this error??

Thanks,
Mousa

[Manju_Reddy_Kanughula]

While installing the REFramework I am getting this.

[Gokul001 (Gokul Balaji)]

Hi @Manju_Reddy_Kanughula

Have a look on the thread

Unable To Use RE Framework Project Due To Microsoft Windows Design Extensibility Error

Resolution fix when it is not possible to use RE Framework project due to Microsoft Windows Design Extensibility error . Issue Description: Projects in Studio based on the Robotic Enterprise Framework template can not be used, due to the error: Microsoft.Windows.Design.Extensibility, version 4.3.10, culture=neutral, PublicKeyToken=b03f5f7f11d50a3a or one of its dependencies. It is not possible to create any new projects, install Studio or open already created projects. Sample of the error: [i…

Regards
Gokul

[marian.platonov]

Try this solution:

1. Download the Microsoft.Windows.Design.Extensibility.dll from the attached file
   Microsoft.Windows.Design.Extensibility.dll.zip (60.7 KB)

2. Extract the zip file and copy the file Microsoft.Windows.Design.Extensibility.dll to the folder C:\Program Files\UiPath\Studio\net461 or C:\Program Files (x86)\UiPath\Studio\net461

3. Remove the dependency UiPath.Testing.Activities 1.4.4 from the RE Framework project in case you have it.

4. Rename the packages folder from the %userprofile%.nuget\packages to packages_old.

5. Retry to run a job in the impacted robot machine.

If the above solution didn’t help, upgrade the Studio to a higher version (22.4.6 or 22.10.3).