ACF Causing Issues In Dashboard

Hi,

I have recently updated a site to 4.0.1 and when I try go to Posts or Pages in the Dashboard I get a blank screen. I have deactivated plugins and it work when ACF is deactivated.

Is this a bug or does anyone know how this can be fixed?

Thanks,
Al.

https://www.ads-software.com/plugins/advanced-custom-fields/