SharePoint 2019 Installation problem in SharePoint Workflow Manager

Question

I am facing issue "Downloaded file failed system verification and may have been tampered with" while installing new Work flow manager. I have tried through Web Platform Installer and also tried by offline webpicmd but still issue is there.

I am attaching screen shot below:

Answer 1

Please check this link https://fixingsharepoint.blogspot.com/2021/02/download-file-failed-signature.html. I found solution in it. All you have todo is get the Workflow_Manager.msi file and from powershell prompt (in the same directory you have Workflow_Manager.msi file) and try this

./Workflow_Manager.msi IACCEPTEULA=yes WEBPI=1