Check this similar case for a hint:
sql server - error: the timestamp signature and/or certificate could not be verified or is malformed - Stack Overflow
https://stackoverflow.com/questions/22433686/error-the-timestamp-signature-and-or-certificate-could-not-be-verified-or-is-ma
Besides, you could add a dotnet-runtime-framework tag on your post, then the experts who are familiar with .net issue will see your post and help you.
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