For me, the issue was fixed by re-issuing a key, also very important, don't login with a different hostname that from the one you registered Blesta with, that will make the license get deactivated, so if you are doing a trial in a local environment and login using your computer hostname for example, don't try to login with either 127.0.0.1 or localhost, or else your license will be get deactivated. @Michael thank you for your help!
César Montilla got a reaction from Michael in Testing Blesta on Localhost, require trial key