Uuuuh...
--------- Loading MODS ---------
exec: invalid script file config/main.cs.
Error: Unable to find specified mod: config
BackTrace: ->loadMods->loadMods
--------- Initializing Base ---------
Should it be doing that? That looks broken.
I would honestly advise you to install a default version of Blockland too see if that's normal on your computer.
On windows you can do this using the -profilepath argument in the shortcut to install an additional copy of BL. I don't know how you'd do it on OSX.