My hoster will move my websites to a new server with better performance in an attempt to upgrade their servers to the latest standards.
This is scheduled to happen in the night from januari 15 to 16. They'll start at 22:00 and finish somewhere before 6:00 am.
If you post a reply or new topic during this window, you either may get an error message, or your post may vanish the next day.
I would therefor advise to not make a post during this window unless you check for it the next day and post it again if the post vanished.
Sorry for the inconvenience.