If PreOrder Now stopped working after you changed themes, the app usually needs to be rechecked in your new theme. Theme changes can remove app blocks, disable app embeds, or leave your preorder settings active in one theme but not another.
What this looks like
You might notice:
the preorder button is missing
the preorder message no longer appears
the app was working before the theme change
preorder is active in the app, but not on the storefront
the cart or product page behavior changed after switching themes
Step 1: Confirm which theme is live
In Shopify admin, go to Online Store > Themes and check which theme is currently published.
If you recently switched themes, make sure you are checking the same theme your customers are seeing.
Step 2: Check whether the app embed is enabled
Open the published theme in the Shopify theme editor and check whether the PreOrder Now app embed is turned on.
If the embed is disabled, the app may not load correctly on the storefront.
Step 3: Check the app block placement
If your store uses app blocks, confirm that the PreOrder Now block is still added in the correct place in the new theme.
Make sure:
the block is added to the right section
the block is enabled
the block is placed on the correct product template
A common issue is that the block was set up in the old theme but not re-added in the new one.
Step 4: Test a preorder product on the live theme
Open a product that should show preorder and confirm whether:
the preorder button appears
the preorder message appears
the product page behaves normally
the cart is still working as expected
If preorder is missing only on certain products, the issue may be template-specific.
Step 5: Compare the old theme and the new theme
If you still have your previous theme, compare:
app embed status
app block placement
product templates
custom code around the product form or cart
This can help confirm what changed during the theme switch.
Step 6: Check for theme compatibility or customizations
If the new theme is heavily customized, or if you recently added other apps that affect the cart or product form, they may be affecting how preorder appears.
This is more likely if:
the preorder button disappeared after a theme update
the cart started behaving differently
only some templates or products are affected
Still not working?
If PreOrder Now is still not working after checking your new theme, contact support and send:
your store URL
the product page URL
the name of the live theme
whether the issue started right after a theme switch
a screenshot or screen recording of what you are seeing
Once we have that, we can take a closer look at whether the issue is caused by your theme setup, template, or a storefront conflict.