This looks much like invalid installation. `powerline-config` script
must be in some directory from $PATH for this error not to happen. And
given that it searches config files and powerline-config script it
looks like if you have two installations.
How did you install powerline? Where are `powerline`,
`powerline-daemon` and `powerline-config` executables?
>
>
>
> Thanks in advance,
> Antoine
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