WebGL build after changing to WebAR not working

[aurlabsyd]

After I incorporated the code, and changed it to WebGL within Unity, i then tryed to build it into a new folder using the WebAR setting. However, after I created the folder I was unable to press build on my selected folder. Has anyone else had this issue? I tried following the steps at 7:30 for this video: https://www.youtube.com/watch?v=c375SFyRlsA