ULX 3.20/ULib 2.10 won't start in GM2007 beta.
This is from both single player, and listen server startup.
From what I can tell of the FacePunch threads, it seems that most people who have made stuff for the beta actually get files dropped into the various folders, so its quite possible Garry doesn't have addons working yet.
Reviewing folder structure after game startup, there is no /data, no /lua/modules, or server.ini added to /cfg.
Lua initialized (Lua 5.1)
ERROR! Module 'ulib' not found!
ULib/init.lua:6: attempt to call field 'pluginLoaded' (a nil value)
Registering gamemode 'sandbox' derived from 'base'
ScriptEnforce: gamemodes/sandbox/clientscripts.txt wasn't found. This gamemode is unprotected.
Executing listen server config file
Executing listen server config file
Precache of sprites/redglow1 ambigious (no extension specified)
exec: couldn't exec listenserver.cfg
exec: couldn't exec listenserver.cfg
InitFastCopy: only 48% fast props. Bug?
Lua initialized (Lua 5.1)
Registering gamemode 'sandbox' derived from 'base'
Sending 267 'User Info' ConVars to server (cl_spewuserinfoconvars to see)
Precache of sprites/redglow1 ambigious (no extension specified)
Redownloading all lightmaps
] ulx who
Unknown command: ulx