Hi Corey,
It seems ZD's management ACL is enabled and it is not letting you access the GUI.
If you know what IP/subnet is allowed on management ACL then you can access the ZD.
If not, you have to access ZD using it's console port and disable the management ACL.
Refer below article for more information.
https://support.ruckuswireless.com/articles/000001541Regards,
Syamantak Omer
Syamantak Omer | Community moderator | Staff TSE | CWNA | CCNA | RASZA | RICXI | Follow me at https://linkedin.com/in/syamantak-omer-5949b6124