Problem
During start of the addin, you get the following error:
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System.Deployment.Application.InvalidDeploymentException: Exception reading manifest from file://MyPath/MyAddIn.vsto: the manifest may not be valid or the file could not be opened. ---> System.Deployment.Application.InvalidDeploymentException: Manifest XML signature is not valid. ---> System.Security.Cryptography.CryptographicException: SignatureDescription could not be created for the signature algorithm supplied. |
Solution
You are using either an outdatet .NET or VSTO Runtime. Please download and install the latest runtimes:
| Panel | ||
|---|---|---|
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Update VSTO Runtime (Requires 10.0.40820) https://www.microsoft.com/en-us/download/details.aspx?id=54251 Update .NET Runtime (Requires 4.6.2) https://www.microsoft.com/net/download/dotnet-framework-runtime |
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