Ok @Jeremy I believe your problem will be solved if you update your vuforia-spatial-remote-operator-addon to the latest version.
This should make the “Initializing AR Tracking” screen disappear.
The remaining steps to make everything load and appear correctly are explained in this thread: No picture from virtualizer appears in webpage of port 8081
In short, you need to click the IP address of your Virtualizer in that upper left box to select it, and then you need to click on the gear icon to open the settings menu, and type in your IP address (without any port numbers) into the “Primary Virtualizer IP” field.