There are two possibilities:
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1. If you log in from another place with the account, the device is forced offline. When you turn on the device again, the system prompts \"Login expired, please log in again\".
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2. The COOKIES of the login information have expired, and the system cannot automatically log in for you.
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Extension answer: 1. Unable to log in to wechat operation method: When you cannot log in to wechat, you can log in by verifying the mobile number 2. After entering the mobile phone number, the mobile phone will verify the code, enter the verification code to log in 3. Log in to wechat 4 through QQ number or wechat memory mailbox. If the above method is not able to log in, then solve the problem by retrieving the password, click the drop-down list in the upper left corner of the login interface [Retrieve password] 5. 6. If you still cannot log in, click the account to appeal for recovery, and fill in the information according to the steps in the section. 7. You can also retrieve the account password, unblock the account or unfreeze the account through the security center