When I click to check in nothing happens. When I refresh the page, then the status has changed from not checked in ot checked in or visa verca. But nothing happens bby using the QR code scanner. I have no idea what settings to use in the QR scanner and of logging in into WP admin on my Android phone is enough or that I need to go the the specific page with attendees. In both cases nothing happes after I scan the code, although the scanner app shows the scans I made, but the list in WP is not updated.