The error means that you hit the max amount of bricks, which is strange as the default value is 256k bricks.
If you start a custom gamemode, then click 'advanced' on the left, see if the 'brick limit' is set at 256000
It's strange you are getting this at the tutorial too because it uses it's own preferences.
What might help is reinstalling Blockland.
You don't have many addons I suppose, so that can't be the problem.