Thank you so much Hozumi!. adding the parameter ('api.enable_flowgraph_access', 'true') This works! 

Thanks you this worked! Great.

HI Charles BraybrookI try to disable these two flags in your browser.chrome://flags/#same-site-by-default-cookies chrome://flags/#cookies-without-same-site-must-be-secureExecute Chrome with a fresh start and should work.Best Regards.