Run utPLSQL test greyed out in Schema Browser (other schema and own schema) #111

Hi,
I'm using the utPLSQL extension version 1.2.0 with SQL Developer 19.4.
I can right-click in the connections window and run utPLSQL tests on packages in my own schema, but I cannot do this on packages in another schema - the utPLSQL options are greyed out. Any idea what could be causing this? If I run them like this from my own schema, it works fine:

set serveroutput on
begin
ut.run('other_schema.ut_package');
end;

PS: I have enough rights to create and execute objects in the other schema.

Thanks
Matthias