It appears that Centurylink and Apple have still not communicated about the Keychain and iCloud problem. I had wonderful support from Apple to resolve this issue but I know this will not be the last time someone runs into this brick wall. Loos for "Mac OS 10.14.6. Safari fails to login to Centurylink Router (ZYXEL C3000Z)" for more information. Thanks again to great Apple Support!!