UX: show a generic error on upload for XHR status 0 #10521
Merged
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This indication covers all cases of network errors, not just "cancelled by user".
The post upload component already has its own handling for user-cancelled uploads, but the generic upload component does not.
Because this error code frequently indicates the browser is refusing to tell the page what's wrong, suggest checking the developer console.
Tested by stopping my localhost server right before attempting to upload a file (browser's net::ERR_CONNECTION_REFUSED).