I am unable to Register MATLAB as a COM Server

hi everyone, i need your help, i can't register matlab as a COM server.

My version of matlab is r2018a.

I tried to write in matlab, after logging in as administrator, the command:

! matlab -regsever

but nothing happens.

I tried to write:

[s, msg] = regmatlabserver

and I get:

s =
      0
msg =
   0 × 0 empty char array

can anyone tell me how to do it ??

Thank you so much