TikTok

1, i want to set up tik tok shopping partner integration,but can not get through the data sharing step,we choose the maximum level,and connect the tik tok pixel for shopify,then click the confirm button,but it shows error:request failed with status code 504;
2,i can not disconnect my current pixels;
3,i even can not disconnect my current tik tok for business account;
that's really annoying
no one help