Substack connection problems
Fixes for errors when connecting your Substack profile in onboarding, when Notes post from the wrong account, and when the extension can't reach your Substack.
Most connection problems come from the wrong URL, a byline that isn't on your posts, or a different Substack account logged in in your browser. Find your symptom below. For how the connection works, see Connect your Substack.
"URL is not valid. Please check and try again."
Why: WriteStack couldn't find a Substack profile at that URL. Post links and some custom-domain links don't work here.
Fix:
- Go to substack.com and click Profile (bottom left).
- Copy the URL from the address bar. It looks like
www.substack.com/@your-handle. - Paste it into onboarding and click Continue.
"URL is invalid"
Why: The text you pasted isn't a valid URL.
Fix: Paste the full profile URL, as in the steps above.
"It seems like none of your posts include you as an author."
Why: Your profile isn't listed as an author on the posts of that publication.
Fix: In Substack, add yourself as an author (byline) on at least one post, then try again.
"No publications found"
Why: Your Substack profile isn't linked to a publication.
Fix: You can click Continue without one. WriteStack still works for Notes. If you do have a newsletter, check that you pasted the profile of the account that owns it.
I connected the wrong publication
Fix:
- Go to Settings → Publication Settings.
- Click Change Publication, then Continue to Onboarding.
- Enter the right profile URL and pick the right publication.
Notes post from a different Substack account
Why: The extension acts as whatever Substack account is logged in in that browser. WriteStack doesn't check that it matches the publication you connected.
Fix:
- Open substack.com in the browser where the extension is installed.
- Log out, then log in with the account that owns your connected publication.
- Refresh WriteStack.
If you manage several Substack accounts, use a separate browser profile for each one.
Scheduling or syncing fails right after I logged out of Substack
Why: The extension needs an active Substack login in the same browser.
Fix: Log in to Substack in that browser, refresh WriteStack and try again. For other failures, see Sync errors.
WriteStack asks for access to my domain
Why: Your newsletter uses a custom domain. The extension needs your permission to reach it.
Fix: Click Grant access (or Allow access to your domain) and accept the browser prompt. If you see Update the WriteStack extension instead, your extension is older than this feature needs. Your browser updates it on its own. See minimum versions.
Still stuck
Contact support with your Substack profile URL and the exact error message.
Ghostwriter
What WriteStack's Ghostwriter mode is (writing and scheduling Substack Notes for client accounts) and how to get access to it.
Sync errors
Fixes for scheduled Notes that didn't reach Substack or didn't post, a missing Sync button, extension not detected, scheduling limits and Substack rate limits.