Hmm, this is weird.

Did you accidentally blocked her?

Nostr can't block anybody, even the censorship resistence is one of the main principle of the Nostt protocol.

Try her npub:

nostr:nprofile1qqs8xhjh8vjt0qfcapkfd2hn0n68237k9p7f4j75aksh8cqcy6mxg7spz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3qamnwvaz7tmwdaehgu3wwa5kuegpp4mhxue69uhkummn9ekx7mqn4la4y