SSAS ErrorCode="3239575554" Either the user does not have permissions to alter the 'SERVER' object I have just installed SSAS on a server called SASBIO1, 
but when I try to run the script below, in order to grant Administrator rights to a specific AD group I get the error message:

&lt;Error ErrorCode="3239575554" Description="Either the 'mycompany\MMiorelli' user does not have permission to alter the 'SASBI01' object, or the object does not exist." Source="Microsoft SQL Server 2014 Analysis Services" HelpFile="" /&gt;


This script grants Admin to BIUsersLIVE:

&lt;Batch xmlns='http://schemas.microsoft.com/analysisservices/2003/engine' Transaction='true'&gt;
    &lt;Alter AllowCreate="true" ObjectExpansion="ObjectProperties" xmlns="http://schemas.microsoft.com/analysisservices/2003/engine"&gt;
        &lt;Object /&gt;
        &lt;ObjectDefinition&gt;
            &lt;Server xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ddl2="http://schemas.microsoft.com/analysisservices/2003/engine/2" xmlns:ddl2_2="http://schemas.microsoft.com/analysisservices/2003/engine/2/2" xmlns:ddl100_100="http://schemas.microsoft.com/analysisservices/2008/engine/100/100" xmlns:ddl200="http://schemas.microsoft.com/analysisservices/2010/engine/200" xmlns:ddl200_200="http://schemas.microsoft.com/analysisservices/2010/engine/200/200" xmlns:ddl300="http://schemas.microsoft.com/analysisservices/2011/engine/300" xmlns:ddl300_300="http://schemas.microsoft.com/analysisservices/2011/engine/300/300" xmlns:ddl400="http://schemas.microsoft.com/analysisservices/2012/engine/400" xmlns:ddl400_400="http://schemas.microsoft.com/analysisservices/2012/engine/400/400"&gt;
                &lt;ID&gt;SASBI01&lt;/ID&gt;
                &lt;Name&gt;SASBI01&lt;/Name&gt;
            &lt;/Server&gt;
        &lt;/ObjectDefinition&gt;
    &lt;/Alter&gt;
    &lt;Alter AllowCreate="true" ObjectExpansion="ObjectProperties" xmlns="http://schemas.microsoft.com/analysisservices/2003/engine"&gt;
        &lt;Object&gt;
            &lt;RoleID&gt;Administrators&lt;/RoleID&gt;
        &lt;/Object&gt;
        &lt;ObjectDefinition&gt;
            &lt;Role xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ddl2="http://schemas.microsoft.com/analysisservices/2003/engine/2" xmlns:ddl2_2="http://schemas.microsoft.com/analysisservices/2003/engine/2/2" xmlns:ddl100_100="http://schemas.microsoft.com/analysisservices/2008/engine/100/100" xmlns:ddl200="http://schemas.microsoft.com/analysisservices/2010/engine/200" xmlns:ddl200_200="http://schemas.microsoft.com/analysisservices/2010/engine/200/200" xmlns:ddl300="http://schemas.microsoft.com/analysisservices/2011/engine/300" xmlns:ddl300_300="http://schemas.microsoft.com/analysisservices/2011/engine/300/300" xmlns:ddl400="http://schemas.microsoft.com/analysisservices/2012/engine/400" xmlns:ddl400_400="http://schemas.microsoft.com/analysisservices/2012/engine/400/400"&gt;
                &lt;ID&gt;Administrators&lt;/ID&gt;
                &lt;Name&gt;Administrators&lt;/Name&gt;
                &lt;Members&gt;
                    &lt;Member&gt;
                        &lt;Name&gt;mycompany\BIUserslive&lt;/Name&gt;
                    &lt;/Member&gt;
                &lt;/Members&gt;
            &lt;/Role&gt;
        &lt;/ObjectDefinition&gt;
    &lt;/Alter&gt;
&lt;/Batch&gt;


The same error happens when I try to do it from SSMS, as you can see on the picture below.


I know I am admin, I am the DBA who installed it.

What is happening?
this was really nonsense.
I right click on ssms and run as administrator, and added the permission there without a problem.