1. Maybe you didn't add the password when scanning the code. If you don't add the password, you can't load the green code. Just add the communication code and scan the green code.
2. WeChat health code can't be scanned. There may be a problem with the system or network. You can wait for a while, or try another mobile phone network. It is also possible that the health code is invalid and cannot be scanned. Click "Update Now" on the QR code to refresh. In addition, by default, the health code is valid for 7 days. The health code has expired, and you need to declare your health again to get it again.
Please confirm whether the network connection is normal. If the network is slow, the dual-card mobile phone cannot be loaded. Please set > in dual card management. Data service and default voice are stored on the same sim card. Try to avoid using this software in the case of 2g network.