Same problem here. I was approved and publishing articles but suddenly nothing works and I have no way to re-apply, register, or login. The documentation just keeps taking me around in circles. Seems like they are pushing us to using a third-party for access.
ccpipeline
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Yes, similar problem here. I had been publishing via the Wordpress plugin for some time and suddenly my channel is gone from Apple News and the links to my "published" articles are dead. The publisher app was also removed from my icloud dashboard. No idea where to go from here to get back in.