Blockland is a computer program, it does not wear out or spontaneously stop working. 99% of all Blockland crashes are caused by user tampering.
Most likely, you have installed or created a defective add-on which interferes with the operation of the game.
Remove any add-ons you have recently installed.If this fails, re-install the game and choose not to keep your old add-ons when the installer asks you.