Plugin conflict after update to 2.6.0

Hi there,
The latest update seems to cause a conflict with the xforwoocommerce plugins product filter module.
With Read More 2.6.0 active I see this error on the fronend:

Notice: Trying to access array offset on value of type null in /wp-content/plugins/xforwoocommerce/x-pack/prdctfltr/includes/compatibility/pf-compatible-preset.php on line 796

I’ve reverted back to Read More 2.5.9 to fix the issue for now.

Is there a setting I need to change for a permanent fix?

Any help would be very much appreciated!

Kind regards,
JP