PR60X Cloudflare DDNS

I am getting an "Authentication unsuccessful" for my Cloudflare DDNS. I have tested my api token so I know it works. I think it may be the username. I have tried my email address tied to the api token, like the flavor text recommends. I have also tried my username, my Cloudflare Account ID, the default "Bearer". I think the username should be blank but the router will not let me.

I have tried with both types of Cloudflare api tokens (user and account). Any help on this is highly appreciated.