Help Moving Multi-Site to a new server

Hi: I'm having trouble moving my wordpress Multi-site installation to a new server.

Two errors I've discovered so far are:

1. Superadmin can't access the network dashboard. I'm able to log into the site dashboard but when I try to go into the network, it takes me to a login screen that my password doesn't work on.

2. Media gallery is behaving erratically. I'm sometimes unable to upload files, sometimes my products only show the gallery images with the others are grayed out, and woocommerce lightbox does not work

This is all I've discovered so far, but there may be more going on that I haven't found yet. Is there a migration plugin that will work? I've searched around, but none of them support multisite at the moment.

Thanks!