Final answer:
The appropriate action when encountering the error message 'There was an error communicating with the Steam servers. Please try again later.' is to try again later.
Step-by-step explanation:
The appropriate action when encountering the error message, "There was an error communicating with the Steam servers. Please try again later." is to try again later. This error message is typically displayed when there is a problem with the Steam servers, and it is out of the user's control. Restarting the computer, clearing the Steam cache, or reinstalling the Steam client will not resolve the issue, as it is a server-side problem. If the problem persists for an extended period of time, the user can consider contacting Steam support for further assistance.