Import multiple Motion Graphics at one's

I'm working on a project that has more then 15 different Motion Graphic elements that are created in After Effects.

Because multiple people are going to use all these elements I wondered if it is possible to import all the Motion Graphics at one's.

If I select import in the Essential Graphics panel in Premiere and select one graphic (.mogrt file), I'm unable to choose a second one.

Am I doing something wrong or is it just not possible.

The problem happens on both Mac and Windows.