server license expiration problem

Dear All,

recently (on May 2018)  we have bought a server license for an application we are developing for a customer.

This license has been applied on the server but is also used in our Visual Studio during the development.

Suddenly, browsing the application the message in the img2 attached appeared.

On img1, instead, there is our  licesnses status.

What’s the mistake?   What’s your license management system?

What’s the correct way to develop with our license and then to use another one  (the server one for the final customer) on the customer server machine?

Thank you in advance