Step-by-Step Guide: How to post to LinkedIn via n8n automations

i am getting this error when I click connect. A linkedin page appear. How do I fix it?

Unknown Host

Unable to locate the server; the server does not have a DNS entry. Perhaps there is a misspelling in the server name or the server no longer exists; double-check the name and try again. Please double-check the URL (address) you used, or contact us if you feel you have reached this page in error.