JavaScript error in admin – wp_version undefined (SCF 6.8.0 / WP 6.9.1)

Hi,

I’m experiencing a JavaScript error in the WordPress admin when using Secure Custom Fields 6.8.0 on WordPress 6.9.1.

Console error:

Uncaught TypeError: Cannot read properties of undefined (reading 'localeCompare')
at scf-admin.min.js

The error occurs on this line:

window.acf.data.wp_version.localeCompare("6.9", void 0, { numeric: true })

In some cases, window.acf.data.wp_version is undefined at the time this code executes, which causes the uncaught error. It appears to be a race condition (possibly related to requestIdleCallback / setTimeout timing).

A simple guard like checking for existence before calling localeCompare() would prevent the issue, e.g.:

const version = window.acf?.data?.wp_version;
if (typeof version === 'string' && version.localeCompare("6.9", undefined, { numeric: true }) >= 0) {
...
}

The issue happens across multiple admin pages (not limited to SCF screens).

Let me know if you need more details.

Best regards