The Services Server will be being upgraded next, and may not work consistently for a period of time (possibly a couple hours, maybe more if things go badly).
Currently it is scheduled to be at 5:00 UTC on Sept 8, which should be late at night in North America and early in the morning in Europe, and a useful time for me in Australia, so hopefully a minimal disruption.
The Services Server handles things like email and DNS, so hopefully it will not overly impact anything while it is down, most things should be cached and/or just work after it is upgraded.
I will also reply here and on the the Keyboard Maestro twitter account when the process starts and finishes.
Refer to the new System Status web page on my web server, which indicates the known status of various servers and systems. If you detect an issue, that is a place you can report it, and I will be promptly informed of the issue and can follow it up.