No Internet Connection while in offline mode

Hello Guys,   I just want to ask a question about pwa in offline mode. I have created tablet web offline and i have created a page to show some data which are saved in one entity. But when i go in offline mode(I turn off wireless) and want to do something there like upload one photo it shows me error where there isn’t network connection and it is not allowing me to click the button. The error is shown below.   Client: An error occurred while executing nanoflow data source for widget MyFirstModule.siteoff.dataView2: The Internet connection appears to be offline.    Best wishes, Nik
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