Get-AuthenticodeSignature Status is returning UnknownError for 1 exe out of 2

Question

I call the Get-AuthenticodeSignature for the 2 exe that deployed on one of the machine. for One exe I am getting status as valid for other I am getting UnknownError

PS > Get-AuthenticodeSignature -FilePath "exe1.exe"

SignerCertificate Status Path

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__________________________________A58013 Valid exe1.exe

PS > Get-AuthenticodeSignature -FilePath "exe2.exe"

SignerCertificate Status Path

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__________________________________A58013 UnknownError exe2.exe

it same certificate. Note: I don't own both exe. it from third party.

as this exes internally call the WinVerifyTrust to verify the certificate. for one I am getting Success for other I am getting TRUST_E_TIME_STAMP = 0x80096005.

Any help/pointer will be helpful.