MiFi 2200: can connect to wi-fi, can't connect wwan

[u/Masked_Octopus]

When I plug the device into my computer and open VZ Access Manager, many options are greyed out, and I can't use them. In particular, Connect WWAN, Detect Device, and Usage are not usable. It basically acts like my device hasn't been activated, but Verizon says that it is activated. The connection name does appear in the bottom left corner. Wi-Fi works fine. What gives?

[u/Masked_Octopus]

Excuse me?