Problems encountered in Taobao payment. Transaction failed! 500512: Signature error, signature verification failed. What is the reason?

If the certificate expires, go to the bank to apply for it again (no charge, no need to replace K treasure, bring your ID card and bank card), then go back and download the certificate again, and delete the original expired certificate (in IE settings ——Content——Certificate, you can see the validity period of the new and old certificate, and then you can use it normally.

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