1. First of all, the education network shows that it is not within the validity period. Refresh the page or clear the cache.

2. Secondly, if you haven't used related services for a long time, you need to re-verify the account information and log in to the account again.

3. Finally, if the account changes the binding information or password, it will also prompt that it has expired and needs to be verified by using the new password or the account password registered with the old number.