Shopify connect


when we connecting our Veloconect project with Shopify were getting Error.
Were just testing now, but we want to move faster to systems, and we need to know how to connect them?
Error like this
Last message: Step shopifyAddSingleProducts - Produkte in shopify anlegen: Error in (Sub)-Step SpreadsheetUrlDownload - POST products (4) Too many errors: (3 / 3). HTTP status: 422 (Unprocessable Entity), Response Content: {„errors“:{„title“:[„can’t be blank“]}}