Whenever I try and assign a category under Fancy Products it doesn't save. The check box shows as ticked but as soon as you navigate away and come back it's unchecked again.

No errors in the console.

Anyone had a similar problem?

We've not heard of the issue before and I can't replicate it on my server either. Could you open a support ticket and send some login credentials and a link to your wp-admin so that we can take a look, please?