I struggled with this for several days and tier 2 support at Zoom wasn't able to help. However, I had accidentally stumbled across a fix. This is how I fixed the issue.
1. Searched Win10 for "Find and fix problems"
2. Select "Additional troubleshooters"
3. Scroll down to "Find and fix other problems," select "Incoming Connections," and click "Run Troubleshooter"
4. A window will pop up asking "What are you trying to do?" and select "Allow other computers to connect to Zoom"
5. After troubleshooter ran, I selected "Apply fix" and the problem was resolved.