Error tojson(ensure_ascii=False)

got exception when using minja through llama.cpp

{"code":500,"message":"Unknown argument ensure_ascii for function tojson at row 11, column 37:\n{% for tool in tools %}\n{{ tool | tojson(ensure_ascii=False) }}\n ^\n{% endfor %}\n at row 11, column 1:\n{% for tool in tools %}\n{{ tool | tojson(ensure_ascii=False) }}\n^\n{% endfor %}\n at row 10, column 24:\n\n{% for tool in tools %}\n