Error: One of the files in the setup has an invalid certificate. File: <path to temporary directory>\BBPatch.exe. Invalid or no signature. when applying a patch on a workstation

When attempting to apply a patch to workstations, the following errors occur, in succession:

- Error: One of the files in the setup has an invalid certificate. File: <path to temporary directory>\BBPatch.exe. Invalid or no signature.
- Error: The installation of the patch has failed (ErrorCode = 1602).
Verify that the digital certificate signatures for BBPatch.exe and PatchPackage.msp are valid.

To do this:
  1. Navigate to the deploy folder.
  2. Open the Patch folder.
  3. Right-click on the file BBPatch.exe and choose Properties.
  4. Switch to the Digital Signatures tab.
  5. In the signatures list, select the Blackbaud, Inc. certificate and click Details.
  6. On the General tab, under the heading Digital Signature Information, verify that the status says "The digital signature is OK".
  7. Repeat steps 1 - 6 for PatchPackage.msp.
If the signature status indicates "This digital signature is not valid", then the digital signature on the patch file is corrupt. The file will need to be replaced with a new copy. This can be done by deleting the patch files from the deploy\Patch folder and reapplying the original patch, as downloaded from the Blackbaud website to the server.

Environment

 7.92.5508 ; 7.91.40

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