Uncaught Error: Language "JavaScript" does not know how to generate code for block type "return".

[alexbk66]

I'm trying the app without any changes and get the error:

Uncaught Error: Language "JavaScript" does not know how to generate code for block type "return".

Since I'm new to Blockly - I'm stuck!

[RIT3shSapata]

@alexbk66 this is because the blocks haven't been appropriately defined, I would suggest learning how to create a custom block.