main.js:344 TypeError: Cannot read properties of null (reading 'length')    at VueComponent.showEmptySlot (vue-good-table.esm.js:13780:82)

rows = rows.map(r => ({  ...r,  children: r.children ?? [], // replace null with empty array}));orfunction sanitizeRows(rows) {  return (rows || []).map(row => {    const sanitized = { ...row };    if (row.children === null || row.children === undefined) {      sanitized.children = [];    } else if (Array.isArray(row.children)) {      sanitized.children = sanitizeRows(row.children); // recurse    }    return sanitized;  });}ornever use rows as null . use [ ] instead