This prompt is to tell you that the software trial period has expired and you can't continue to handle business in the future.

Two ways:

1. Re-establish the account, and pay attention to the opening time of the account set, which is generally only 3 months.

If you buy the official version of the software, there will be no expiration prompt.

I don't know how many months the educational version has been tried out. You can continue to try without doing month-end processing.