Authentification error

Hi, i got access to 3DExperience Engineer which was included in the BackToSchool2020 offer. But whenever i try to start it, i get this error. It says that the connection to the Sever was not successfull and that i should check the connection parameters. 
Do you guys know this problem and can tell me how i can solve it?


3DEXPERIENCE Authentication Error Edu Back To School