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Plugin activates but “Yuko Integration” is missing from the WordPress sidebar

Possible causes, in order of likelihood:
  1. Hard-refresh the WordPress admin page (Ctrl+Shift+R / Cmd+Shift+R)
  2. Log out and log back in
  3. Try a different browser or an incognito window
Cached admin menu HTML is the #1 reason for this.
Yuko menu items are only visible to users with the manage_options capability (Administrator role).Check Users → Your Profile → Role. If you’re an Editor or Shop Manager, ask a site admin to grant access.
  1. Deactivate every non-essential plugin except Yuko and WooCommerce
  2. Check if the Yuko menu appears
  3. Reactivate plugins one at a time, checking after each, until the conflict surfaces
Common culprits: aggressive security plugins (WordFence, iThemes), caching plugins that strip admin pages, or custom role managers.

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”Connection failed” when authenticating your store

Checklist:
Store URL format is correct:
  • Starts with https:// (not http:// — Yuko requires SSL)
  • Uses your primary domain, not a staging preview URL
  • Does not include /wp-admin, /shop, or trailing slashes
  • Matches exactly what’s set in WordPress Admin → Settings → General → WordPress Address (URL)
✅ https://yourstore.com ❌ http://yourstore.com/wp-admin
Plugin and WooCommerce are both active:
  • Yuko Integration shows “Active” under Plugins
  • WooCommerce shows “Active” under Plugins
  • Your shop page loads normally at the front end
Security isn’t blocking the handshake:Temporarily disable:
  • WordFence / Sucuri / iThemes Security
  • “Block REST API” rules in any security plugin
  • Cloudflare’s “Under Attack” mode (drop to “Medium” for a minute)
Try connecting again, then re-enable. Whitelist app.yukoapp.com in your security rules permanently.
REST API is reachable:Visit https://yourstore.com/wp-json/yuko/v2/ in your browser. You should see a JSON response (possibly {"error":"unauthorized"} — that’s fine). A 404 or 500 means the REST API is blocked.If blocked, check Settings → Permalinks and re-save to refresh rewrite rules.

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”Invalid signature” error during authentication

This happens when the plugin and backend don’t agree on the HMAC signature. Usually caused by:
  1. Clock drift — your server’s time is off by more than 5 minutes. Check with date on the server or a time-checking WordPress plugin. Contact your host if skewed.
  2. Plugin reinstalled — the local secret key was regenerated but the backend still holds the old one. Disconnect from the Yuko dashboard (Account → Integrations → WooCommerce → Disconnect), then re-authenticate from WordPress.
  3. Two plugin installs on the same WP site — only one Yuko Integration install per site is supported.

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”HTTPS required” error

Yuko requires HTTPS on the storefront. If you see this:
  1. Install a free SSL certificate via your host (most hosts offer Let’s Encrypt one-click)
  2. Force HTTPS in Settings → General → WordPress Address (URL) — both fields must start with https://
  3. Update any hardcoded http:// URLs with a plugin like Better Search Replace
  4. Flush permalinks (Settings → Permalinks → Save)
  5. Re-authenticate in Yuko

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Plugin upload fails with “file too large”

Your host’s PHP upload_max_filesize or post_max_size is too low.
  • Ask your host to bump both to at least 10 MB, or
  • Install via FTP instead (see Advanced installation in the install guide)

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After a host migration, Yuko shows “Disconnected”

Moving your site between hosts changes file paths and often regenerates secrets. After migration:
  1. Yuko Dashboard → Account → Integrations → WooCommerce → Disconnect
  2. WordPress Admin → Yuko Integration → Re-authenticate
  3. Confirm the new store URL (usually the same)
  4. Run a fresh sync
Your collected reviews are preserved — they live on the Yuko backend, not in the WordPress database.

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