Hi everyone,
I am trying to update Modified By field by following below steps from the link below:
#FlowNinja hack 78 - modifying Modified By and Modified time with Microsoft Flow — John Liu .NET
However, I have issue when to send an HTTP request to Sharepoint action. Below is the screenshot:

The error details that I got is below:

I am not sure where is the issue. My sharepoint list title is correct, 'testupdatecountleave'. The item ID that I am testing is also correct ID = 5.
Not sure where is the error. Hope someone can help.