If EpocCam is using Wifi and not connecting to a PC or Mac, the following troubleshooting steps can be used. 

Download Camera Hub 

Download the latest version of Camera Hub from elgato.com/downloads

Check if the Bonjour service is running (Windows only)

If the Bonjour service is not running, EpocCam will not connect wirelessly. 

1) In Windows search, type Services, and open Services.

2) In the services list, scroll down and find Bonjour Service.

Note: Pressing B on the keyboard will immediately jump to services with names that start with B.

3) Right-click on the Bonjour Service and select Properties.

4) Under Startup type, make sure it's set to Automatic or Automatic (Delayed Start).

5) If the service is not running, press Start.

6) With the Bonjour service running, check if EpocCam is selected within Camera Hub.

Check firewall settings

Check your firewall settings. Your firewall application can block the traffic between your PC and phone.

If you use the Windows Firewall, the Windows installer for Camera Hub will automatically configure it to allow traffic.

If you are using third-party firewall software like Norton or F-Secure, you will need to configure them to allow Bonjour-service traffic on UDP port 5353. 

Restart the PC, Mac, or iOS device.

Restarting the device can solve many different issues.  
 

Reboot Router

Rebooting the router can solve many different issues.  

Each router has a different reset method. There may be a button on the router or a local web page you can visit.

If you don't have those options, you may need to unplug and replug the power cable from the router, but you may want to check with your ISP to make sure that's recommended.
 

Connect PC or Mac to Router

For EpocCam to connect to a computer, the iPhone/iPad and computer must be connected to the same network. 

This connection can be either a Wi-Fi or wired Ethernet connection.

Check advanced network settings

Certain settings on a Wi-Fi router can prohibit devices on the network from communicating with each other. This would result in EpocCam being unable to connect to a PC or Mac on the network. 

Double-check that these services are either disabled or enabled respectively.

Ensure that these services are enabled on the Wifi router:

• Multicast
• Internet Group Management Protocol (IGMP)
• mDNS

Ensure that these services are disabled on the router, as they could prevent EpocCam from connecting to a PC or Mac on the same network:

• AP/client isolation
• Virtual Private Networks (VPNs)
• Proxy Servers
• IGMP Proxy