Same issue, My phone's plan is "Do More Unlimited " is fine with hotspot. My tablet is 'Unlimited" plan. Has hotspot-ed fine in the past. A couple weeks ago, not so much, only sometimes. Now NO hotspot at all with any type of device.
When msg'd in the Verizon robo support says the tablet plan does NOT have hotspot in the plan and asks if I want to upgrade the plan?
I do not think so, the plan clearly states
You do more with your device so you need more from your plan. Perfect for streaming music, video and more.