WooCommerce Blocks development mode requires the {bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}1$s constant to be defined and true in your {bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}2$s file. Otherwise you are loading the blocks package from WooCommerce core.