[CMS] Site Server Task Service grey out. Not able to select service

Hello everyone,

I'm setting up a new site server. However, following the steps, and after selecting the computer for such role, I find the checkbox for Task Service grey out. See image below:

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Is this a normal behavior? Or is there something I'm missing? See the agent/plugins installed in the PC selected for this role

Image may be NSFW.
Clik here to view.

Any ideas? Thanks