The correlation ID means nothing. It is simply a unique identifier used to link together steps in a single request. This information is only useful to the support engineer who can look up the correlation ID in the system logs and figure out from there what happened.
You haven't provided us any context about what you're doing. Just based upon the screenshot it looks like an intermittent issue with whatever service you're using. Wait for a while to see if it resolves, try a different browser and/or user to see if that resolves the issue.