custom permalinks

hey,
after i updated my permalinks to %category%/%tag%/%postname% i can’t open posts, because it shows like %tag% in links, not as actual tag. Not all my posts have tags, but i’m still fixing that, as i moved all my posts from blogger to wordpress.

An example: https://lyrics2bg.com/metalcore/caliban/%tag%/caliban-i-rape-myself shows bad request as actually there isn’t a folder called %tag% ?? but if I replace %tag% in the address bar with its actual Tag “The Undying Darkness (2006)” it redirects me again to the upper address. How to fix that so that my permalinks looks like %category%/%tag%/%postname%

thanks in advance ??