Your after startup microflow contains logic to enable logging in via the Mendix Cloud. Check your settings for that or remove that steps if you don't want to use that.
You cannot use the App Cloud Services when running on-premises, only from within the Mendix Cloud.
You can disable the App Cloud Services by removing the call to the following microflow: AppCloudServices.StartAppCloudServices
If you do not intend to switch to the Mendix Cloud in the near future you could even consider removing the AppCloudServices module altogether, as you can always get it from our Mendix App Store again once you move to the Mendix Cloud.