See if your account is eligible to set up payments per https://support.google.com/adsense/answer/1709858?hl=en
If not, then wait until it is.
If you are eligible or are having problems adding /changing payments info, then Adsense is aware of this issue and working on it.
You can send feedback from your account and wait for it to be fixed.
Sorry, we don’t know when this will be fixed.