Yun Wireless connection issues

I’ve been working on my senior project, regarding a camera that takes pics of its surroundings and then processes the images for signs of cars. To that end, I hoped to use an Arduino Yun to set it up and was planning to use these instructions as a starting point for the project. However, my attempts to set up wireless access to the Yun hasn’t gone far. While I was able to run the YunFirstConfigure program without issue when I attempted to use the URL the device itself gave me to access it remotely, it timed out, and network diagnostics claimed that the Yun wasn’t responding, as shown in the attachment. I’m not sure what to do to get it to respond, and I’m wondering if there’s anything I’m missing.