Not found when I refresh my shiny app

My shiny dashboard works well when I deploy it. But when I refresh it, "Not found" statement appears.
I paid attention to the log, there is no trouble with data import .

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal [REPRoducible EXample (reprex) illustrating your problem? A reprex makes it much easier for others to understand your issue and figure out how to help.

Please have a look at this guide, to see how to create one for a shiny app

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