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I have following msg: No withnesses configure! Please add withness names and private keys...
But my configurations looks like this:

name of witness controlled by this node (e.g. initwitness )

witness = "phare"

name of miner and its private key (e.g. ["account","WIF PRIVATE KEY"] )

miner = ["phare","5---------------------M"]

What is wrong?

Are you running Windows or Ubuntu OS? How did you generate the WIF private key?