Does PhastPress work on multisites?

Hi, I just set up a WP multisite, with Elementor, PhastPress and a few other plugins. To my surprise I got two huge problems:
1- The dropdowns in the nav menu aren’t there.
2- Elementor gallery is not there.

Not there is only in the front end. In the backend everything works fine. The menu has the dropdowns, and the galleries show nicely.

So I started troubleshooting. The culprit, I very much regret to say, is PhastPress. Once I deactivated that one, the sites run smoothly. When I turn it on, the problems (1&2) are back.

I really like PhastPress, what can I do to get it to work, if it can work on a multisite properly? The speed increase is huge. I shot up from 78% to 97%.