Fatal error in ACF integration when saving non-cacheable post types

Bug: Fatal error in ACF integration when saving non-cacheable post types

Plugin version: Latest PHP version: 8.3

File: classes/Integration/Plugin/ACF.php, line 28

Error:

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, bool given

Root cause:

In invalidate_post_due_to_acf_change(), line 23 reads:

$allowed_cpts = get_option('nitropack-cacheableObjectTypes');

When this option doesn’t exist yet (e.g., fresh install or after a reset), get_option() returns false. Line 26 correctly detects this and calls update_option() to set the default, but doesn’t reassign $allowed_cpts — so it’s still false when passed to in_array() on line 28.

Fix: Reassign the variable after computing the default:

if (!is_array($allowed_cpts)) {
    $allowed_cpts = CPTOptimization::getInstance()->nitropack_get_default_cacheable_object_types();
    update_option("nitropack-cacheableObjectTypes", $allowed_cpts);
}

This happens when saving any post type via ACF (in our case, WooCommerce coupons — shop_coupon).

Can you please update this?

Cheers,
Roland