When your automations shut down overnight
You launch your Phantoms late afternoon, expecting them to run overnight… only to wake up to a series of “Expired session cookie” warnings. Suddenly, all scraping and messaging stops. If you’ve lost hours of automation to a stale cookie, keep reading.
What’s really happening?
Phantombuster relies on your LinkedIn session cookie (li_at) to authenticate API calls. When that cookie expires—either because you logged out, LinkedIn invalidated it after inactivity, or triggered a security check—the Phantoms lose access and halt with an error. Excessive actions in a short span can also prompt LinkedIn to expire your cookie as a precaution.
Until you supply a fresh cookie, no profiles can be scraped and no messages sent.
1) Quick-fix: renew your session in under 2 minutes
Retrieve a new li_at cookie
Open LinkedIn in your browser, log in, then copy the updated li_at value from your browser’s cookies.
Update Phantombuster credentials
In Phantombuster, go to Settings > Session and paste the new li_at.
Restart your Phantoms
Resume or rerun the jobs—you’ll see the errors clear and automations resume immediately.
With a fresh cookie, Phantombuster reconnects to LinkedIn and picks up where it left off.
2) Prevent future expirations
Stay logged in: avoid logging out of LinkedIn in other tabs or devices during long-running Phantoms.
Respect rate limits: throttle actions to mimic human behavior—add random delays and limit daily volumes.
Automate cookie refresh: schedule a quick cookie fetch step in your sequence (Phantom script) at regular intervals (e.g., every 6–8 hours).
These steps minimize unexpected session lapses.
3) Why ReactIn never drops a session
Tired of manual cookie updates? ReactIn uses server-side headless browsers to manage LinkedIn sessions smoothly:
Auto-renewed cookies – ReactIn refreshes session cookies seamlessly before expiration, invisible to you.
Single sign-on – connect once via OAuth; ReactIn’s backend handles all session tokens without storage in your browser.
Adaptive pacing – built-in rate control keeps actions within LinkedIn’s safe thresholds, preventing forced logouts.
With ReactIn, your outreach runs uninterrupted—no more dead Phantoms or stale cookies.
Ready to automate without interruptions?
Switch to ReactIn and keep your LinkedIn campaigns humming 24/7.
