See the attached screenshots - I am seeing a consistent pattern where browsersim cannot open a URL that specifies localhost, such as:

http://localhost:8080/ticket-monster/mobile.html

But it is able to open a URL for the same page, if it specifies 127.0.0.1, such as:

http://127.0.0.1:8080/ticket-monster/mobile.html

See the attached screenshots.