Orion Problem: Verify the Maximum Worker Processes setting value for SolarWinds Orion Application pool is set to 1

While randomly browsing through an Orion deployment i noticed this error at Deployment health:

The information provided is:

What went wrong
Diagnostic failed: Filename: \\?\C:\InetPub\SolarWinds\web.config Line number: 297 Error: Unrecognized attribute 'cookieSameSite'

Orion 2020.2.6 : NPM, NTA, NCM

Thanks in advance for any replies.