Session control in antiX (full/base) is managed by desktop-session, which handles the launching of the window manager, desktop-icons (if any rox- or space- sessions are started), programs and applications that launch during startup (like conky, volumeicon, etc).
If programs/scripts try to load before the window manager is fully loaded, then errors occur. One of them is the desktop icons handler not starting properly. To solve this, the antiX developers offer an option to delay the startup of programs.
Editing the /home/user/.desktop-session/desktop-session.conf file, and increasing the STARTUP_DELAY should solve most of these problems (the delay is in seconds).
You will often see this behavior with old and slow CPUs. The default delay time of 2 seconds is too short for the window manager to completely load, so you may experience a rox-filer pinboard error or find that there are no icons at all on the desktop (the desktop icon manager didn't launch at all).
Note: rox-filer manages the desktop icons with what it calls a "pinboard". Different from other desktop icon handlers, the pinboard ignores the ~/Desktop folder and saves its configuration in a separate file inside ~/.config. If you want a more traditional desktop icon experience, switch to a space- session from the menu > Desktop > Other Desktops, for example space-iceWM