Invalid Chart

{"id":13789,"date":"2020-11-18T06:16:19","date_gmt":"2020-11-18T06:16:19","guid":{"rendered":"https:\/\/www.geneticmatrixtest.com\/?page_id=13789"},"modified":"2020-11-18T06:16:19","modified_gmt":"2020-11-18T06:16:19","slug":"diagrammformular-bearbeiten","status":"publish","type":"page","link":"https:\/\/www.geneticmatrix.com\/de\/diagrammformular-bearbeiten\/","title":{"rendered":"Diagrammformular bearbeiten"},"content":{"rendered":"[EditChartForm]","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/pages\/13789"}],"collection":[{"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/comments?post=13789"}],"version-history":[{"count":0,"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/pages\/13789\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.geneticmatrix.com\/de\/wp-json\/wp\/v2\/media?parent=13789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}