AMS received an update around 6pm cet 5/27. The dedicated server did not as far as I could tell from Steam. I wanted to restart one server and now it messages mfc100u.dll missing on config box startup (which I fixed by downloading 2010 C++ x86 Redistributable) but it always crashed when loading the first track (the server crashes). Just to let you know ...
The crash cause is Hockenheim 1977 : this track (with Formula Ultimate) crashes the dedicated server on load.
This is still occurring on my "dedicated hardware server": Hockenheim 1977 crashes the dedicated server itself when that attempts to load the track.
The issue should be fixed with v1.4.05. Try running an Integrity Check to make sure you have all the latest files.