Plotly orca not working after conda install

On installing plotly-orca i get the following error message:

The orca executable is required in order to export figures as static images,
but the executable that was found at ‘/usr/bin/orca’
does not seem to be a valid plotly orca executable. Please refer to the end of
this message for details on what went wrong.

If you haven’t installed orca yet, you can do so using conda as follows:

$ conda install -c plotly plotly-orca

Alternatively, see other installation methods in the orca project README at

After installation is complete, no further configuration should be needed.

If you have installed orca, then for some reason was unable to
locate it. In this case, set the
property to the full path of your orca executable. For example:

But there is no orca executable in my env executable path?
what should i do?