Some prompts fail with: thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Utf8Error { valid_up_to: 0, error_len: None }', /home/kimt/.cargo/registry/src/index.crates.io-6f17d22bba15001f/llama_cpp_rs-0.3.0/src/lib.rs:528:46 I'm using this model: https://huggingface.co/TheBloke/Luna-AI-Llama2-Uncensored-GGUF Anything I can do to try to fix this problem?