Hi Michael,
From what I understand, you are getting a licensing error when trying to run MATLAB with a trial license. The "Licensing error: -9,57" is usually caused by a username mismatch, i.e. the OS username of the user launching MATLAB not matching with the username used during activation. This often occurs when an administrator activates MATLAB for a user.
For more details and resolution steps, you can refer to the following article:
Hope this is helpful.
