First, it may be known that the network status of your device is not good enough, resulting in network failure, so you can not sweep out the travel code, which is also the most common reason, if you need to verify, you can use someone else's mobile phone to scan the code. If someone else's can scan it's your phone.
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Second, if others can not scan the code, you can consider that the platform is faulty, you can contact the platform for repair. Contact customer service for advice
It doesn't matter, change a mobile phone, and then log in to your account you can then punch the card, or use your family's mobile phone to log in the family number to help you check, or explain the situation in person.
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If there are conditions, you can change a new phone, re-download a health code. If you don't want to replace your mobile phone, take it to a mobile phone repair shop. Use it after you fix it. During this period, you can borrow an old mobile phone, download the health code, and do not clock every day.