Troubleshooting
"Sandbox went to sleep"
Your preview paused after a while without activity. One click brings it back.
What you see: Sandbox went to sleep due to inactivity. Your project files are saved.
What happened
Your live preview runs on a small computer that Dunea starts just for you. When nobody has used it for a while, it goes to sleep to free up space. Your files are not deleted. Only the preview has paused.
How to fix it
Press Resume on the message. The preview starts again in a few seconds and shows your site exactly as you left it.
“Session ending” and “Session ended”
You may see a countdown like Session ending in 2m 30s — save your work. It means your connection to the preview is about to close. Anything Dunea built is already saved; the countdown is only a warning. After Session ended, close the message and reload the page to connect again.