PUSH button disappear under staging pro

hello,
I’ve been using WP-staging pro for a little while, and noticed today that the PUSH button disappeared. I created a new staging version just in case, but problem remain the same.
Is this due to the last update? I can’t tell if the button was already missing before updating to 3.0.5. And i’ve updated wp-staging pro on both website and clone.
And yes, I’m using the pro version 3.0.5 so this is not due to a lite installation.
Thanks for your help!