There is No security issue if you open the link. Since browsers are constantly getting updated, it may happen that some browsers will show security warnings. When connecting to the cloud and opening the log files via the remote link, the URL consists of numbers and characters combination. This automatically triggers a browser warning, which is not a threat to your system!
You can ignore the warning and click on "Advanced" or"Details" (this may vary depending on your browser) and continue to open the link.