I just opened the project in the morning, and I was confused. It was only one night. Why did VS suddenly stop working... It shows that the evaluation of the 30-day trial period is over.
The first reaction was to charge for it. After a search, I found out that the VS2015 Community Edition is free of charge.
It turned out to be because I didn't log in to the account at first, so VS gave a default evaluation license, which is valid for 30 days. After the time is up, it can't be used.
The solution is to log in. If you don’t have an account, you can register and log in, and the server will automatically update the license.
No account registration
Follow step by step, create an account -> set password -> verify mobile phone number -> return to VS to log in
Since I have already set it up, I will not take screenshots and demonstrate here, just follow the operation.
After the setup is successful, click Login
enter password
set successfully
VS can be used normally~