installing the de2bi function

I installed matlab R2018b, and I need the function de2bi, I can not install it when I click on install, it displays the following message:

Your administrator has closed your access to this MathWorks product.

Contact your MATLAB administrator (s) to request access.

[Rik]

Then you should contact your IT, just as this message tells you.

Or are you getting this message on a personal computer with a personal licence?