I2P Ubuntu via PPA

ID: i2p-ubuntu-via-ppa

sudo apt-add-repository ppa:i2p-maintainers/i2p
sudo apt-get update
sudo apt-get install i2p
but then when I ran:
i2prouter start
it fails with:
Starting I2P Service...
Removed stale pid file: /home/ciro/.i2p/i2p.pid
Waiting for I2P Service.....
WARNING: I2P Service may have failed to start.

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