Final answer:
A 403 error message indicates that the server has denied access to a webpage. If you cannot open an HTML page in Dreamweaver for device preview, it could be due to server issues or configuration errors. Troubleshoot the problem by trying different devices/networks or contacting the website owner.
Step-by-step explanation:
When you receive a 403 error message, it means that the server has denied your request to access a particular webpage. This might be due to reasons such as too much website traffic or a configuration error. In this case, the error message suggests trying again later or contacting the app or website owner for further assistance.
If you are trying to preview an HTML page on a device using Dreamweaver, but it cannot be opened, it is possible that the page is hosted on a server that is currently experiencing issues or is not accessible from the device. To troubleshoot this, you can try accessing the page from a different device or network, or reach out to the website owner for help.
Remember, Dreamweaver is primarily used for designing and editing web pages, and it relies on the availability of the page in order to preview it on devices. If the server hosting the page is down or experiencing issues, you may not be able to preview it in Dreamweaver until the server is back online.