@chanelle The error still persists for me. I can neither add TikTok conversions nor TikTok leads. I have tried to add this connection via the Zap itself, the TikTok Ad Leads page and the Zapier Connections page (https://zapier.com/app/connections). All three of them were unsuccessful. It looks like there is an OAuth2.0 error either on Zapier’s or TikTok’s side - as one of them is out of sync and does not return the parameter needed for successful authentication (access_code). Please look into this and let us know when it works. Thanks!