# Substack connection problems (/docs/using/troubleshooting/substack-connection)

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](/docs/using/setup/connect-substack).

## "URL is not valid. Please check and try again." [#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:**

1. Go to [substack.com](https://substack.com/) and click **Profile** (bottom left).
2. Copy the URL from the address bar. It looks like `www.substack.com/@your-handle`.
3. Paste it into onboarding and click **Continue**.

## "URL is invalid" [#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." [#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](/docs/using/setup/add-byline) (byline) on at least one post, then try again.

## "No publications found" [#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 [#i-connected-the-wrong-publication]

**Fix:**

1. Go to **Settings → Publication Settings**.
2. Click **Change Publication**, then **Continue to Onboarding**.
3. Enter the right profile URL and pick the right publication.

## Notes post from a different Substack account [#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:**

1. Open [substack.com](https://substack.com/) in the browser where the extension is installed.
2. Log out, then log in with the account that owns your connected publication.
3. 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 [#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](/docs/using/troubleshooting/sync-errors).

## WriteStack asks for access to my domain [#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](/docs/using/setup/browser-extension#minimum-versions).

## Still stuck [#still-stuck]

[Contact support](/docs/using/support) with your Substack profile URL and the exact error message.