Prevent All Products block from crashing when error has no json method (https://github.com/woocommerce/woocommerce-blocks/pull/2269)

plugins/woocommerce-blocks/assets/js/data/shared-controls.js

@@ -35,10 +35,14 @@ export const controls = {
 					} );
 				} )
 				.catch( ( errorResponse ) => {
+					if ( typeof errorResponse.json === 'function' ) {
 						// Parse error response before rejecting it.
 						errorResponse.json().then( ( error ) => {
 							reject( error );
 						} );
+					} else {
+						reject( errorResponse.message );
+					}
 				} );
 		} );
 	},