You no longer need the Chrome extension to connect your Linkedin account.
Navigate to Linkedin accounts settings , and just click on "Connect a Linkedin account".

Connecting your account with the Chrome extension is still possible but will very likely end up with returning failure while performing actions.
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This is due to the new way cookies are handled on Linkedin. Now the same session can't be shared on 2 machines, so we have to create a different cookie session instead of using the one from your chrome browser.

To take action on your behalf on Linkedin, useArtemis needs to connect as you. To do this, it needs your session cookies. This will give useArtemis access to your Linkedin account.