⚠️ Fix Guide: “Access blocked: Request is invalid” (Error 400: redirect_uri_mismatch)

If you see this Google error while connecting your YouTube account:

Access blocked: [App Name]’s request is invalid
Error 400: redirect_uri_mismatch

it means your Redirect URI in Google Cloud Console does not match the one used by Stackposts.

🔹 Step-by-Step Solution

1️⃣ Go to Google Cloud Console

• Open https://console.cloud.google.com/apis/credentials

• Log in with the same Google account that created your YouTube API project.

2️⃣ Open Your OAuth 2.0 Client

• Under OAuth 2.0 Client IDs, click the name of your app.
  (It looks like your Client ID starts with:
  460228741010-7m2ttd3fj76jrk8bbyjn84vr45m06jst.apps.googleusercontent.com)

3️⃣ Check “Authorized redirect URIs”

Scroll down to Authorized redirect URIs, and make sure it includes the exact URL from your Stackposts YouTube settings:

💡 Example (from your screenshot):

⚠️ The URI must match exactly — including https://, /app/youtube/channel, and no extra slashes.

4️⃣ Save Changes

• Click Save at the bottom of the Google Cloud Console page.

5️⃣ Retry Connection

• Return to your Stackposts panel → YouTube API settings.

• Click Save changes, then try connecting your YouTube channel again.

• The Google sign-in window should now work without the redirect error.

🔹 Common Mistakes to Avoid