failed to load model

[njXuanX]

[1] llama_model_load: loading model from 'F:\GPTProgram\alpaca.cpp-webui\bin\ggml-vicuna-7b-1.1-q4_0.bin' - please wait ...
[1] llama_model_load: invalid model file 'F:\GPTProgram\alpaca.cpp-webui\bin\ggml-vicuna-7b-1.1-q4_0.bin' (bad magic)
[1] main: failed to load model from 'F:\GPTProgram\alpaca.cpp-webui\bin\ggml-vicuna-7b-1.1-q4_0.bin'

bin and model has in right place and config file edited, webui run but can not response to any prompt.