Error change subscription

Something went wrong when trying to update your subscription, please let us know if this happens again. - Code:functions/unknown

(Debug information, this helps us helping you, you can remove this if you don’t want to share this data, it should not contain any personal or sensitive information)
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36
Cookies Enabled: true
Screen: 1536 x 864 px - 1.25dppx

Thanks, I have sent you a PN about how to fix this for your case.