I have a flight on July 31st and I'm currently trying to complete my online check-in. However, I encountered an issue with the following message:

"Please click the button below and check as changes to passenger information and seating during checkin may be reflected. Please contact the airport or service center if the check-in is unsuccessful."

When I attempted to restart my check-in, I received a new status indicating that my passport or visa is no longer valid. Has anyone experienced this or know what might be causing it?