This is what tripped me up. I added that config and then got this error:

error: Failed to parse: `.config/uv/uv.toml` Caused by: TOML parse error at line 1, column 17 | 1 | exclude-newer = "7 days" | ^^^^^^^^ failed to parse year in date "7 days": failed to parse "7 da" as year (a four digit integer): invalid digit, expected 0-9 but got

I was on version 0.7.20, so I removed that line, ran "uv self update" and upgraded to 0.11.2 and then re-added the config and it works fine now.