There is a lot that can go wrong when working with any new technology, not only because of your lack of familiarity, but it may also happen that the technology may not be prepared to do all the things it claims it can do. Here's a table of common issues you may encounter while working through the book:
| Platform | Issue | Resolution |
| Web | Unable to load page or find server | Check whether you are using the correct endpoint for your machine. If you have a few choices, try a different option. Confirm that your system does not have a firewall running that could be blocking the communication. Try disabling your firewall (temporarily) and try again. If this resolves the issue, then make an exception in your firewall for port 9999 or whatever port you used. |
| Web | ARCore displays an error message on the page | Ensure that the ARCore service is installed and you are... |
