Inability to find what you desire while searching on the internet (web). This could be due to the fact that what you are searching for does not exist; or there were too many similar links/choices interfering with my ability to complete the task.
I was searching for instructions for how to build a bench for my backyard on the internet and I could not find relevent instructions. I could not overcome the webstacle in my way, and could not find the instructions. No bench was built. Similar to obstacle.....but since the medium was the web.... it became a webstacle.