Enterprise WeChat server certificate date is invalid.

Solutions to invalid or expired server certificates:

1, computer system time error: the computer system time can be adjusted within the validity period of the server certificate.

2. The server certificate is not installed correctly: Please reinstall the certificate or contact customer service to help install the certificate.

3. Use self-signed server certificate: Self-signed certificates are risky, so it is recommended to use browser certificates issued by trusted CA institutions, such as Comodo, GeoTrust, Symantec, etc.

4. The server certificate does expire: renew the fee or buy the certificate again.

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