1. Personalization not enabled on the product
The most common cause. Open the product in your storefront admin. Check that the PrintIntegrator tab shows "Personalization: Enabled". If not, toggle on, save, and reload the storefront page.
2. Cached page from before install
Storefront caches sometimes show the pre-PrintIntegrator version of the product page. Clear cache:
- Shopify: usually clears within seconds; force-reload with shift+reload.
- WooCommerce: clear your WP cache plugin (W3 Total Cache, WP Rocket, etc.).
- Odoo: clear browser cache; Odoo's own cache is rebuilt on save.
3. Theme version older than required
On Shopify, the designer requires a Shopify 2.0 theme. Themes from before 2021 are not supported. Update or switch theme.
On WooCommerce, the plugin requires WooCommerce 8.0+. Update WooCommerce.
4. Browser extensions blocking scripts
Aggressive ad-blockers, script-blockers, or strict CSP browser extensions sometimes block the designer's JS bundle. Test in an incognito window with all extensions disabled.
5. Mixed-content errors (HTTPS only)
If your storefront is HTTPS but an asset URL is HTTP, modern browsers block it. Check the browser console for "Mixed content" errors. Common cause: a custom font or logo URL hardcoded with http://. Switch to https://.