Hi @YamahaMCuser! Welcome to community, thanks for posting your experience.
I've enabled a trace on your account to help us understand what may be happening. In the meantime, I've removed the device associations from your Pandora account. When this takes affect (it may not happen immediately), you will be automatically logged out of your Yamaha devices.
After this, please try to activate your Yamaha(s) once more. If you continue to receive the access error message, let me know the time and date so I can take a closer look.
Thanks!
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