Close all web pages. It is best to clear the cache. Most browsers have this function. Then restart the system, open the web page, log in, re-enter the payment page, and do it again, if required. When verifying security certificates and the like, be sure to select Agree or Yes, do not reject. Once rejected, the operation will fail. If there is a prompt asking for a certificate file to be installed, be sure to install it. Generally, if you enter from the Paipai homepage ( Pay attention to the prompts that appear after checking the network address format) and there will be no problems. You can install and agree with confidence. If there is a prompt that does not agree or does not install, your problem may occur. Pay attention. If the above operations cannot solve it, it is recommended that Try changing to another computer. It may be caused by conflicts between your system files or previous rejected operations. Reminder: If you enter other pages except the correct web address and are repeatedly prompted to enter your account and password, you must be careful to see if your account has been stolen. Website, avoid, be careful.