Missing the Object app.encoder [14.3.1, 15.0, 15.1, 15.2]

Hello,

i wrote a Adobe Premiere extension and i have a big problem.

This object from ExtendScript "app.encoder" is null.
I have the Problem in the Following Version: 14.3.1, 15.0, 15.1 and 15.2.
At 15.4 and above the object ist fine and works.

What could be the problem?
Unfortunately, the customers who use the plug-in cannot simply update the Premiere version.

Is this a Premiere problem or am I doing something wrong?

My Setup: 
MacOS Monterey
Adobe CEP 9
Premiere Pro 14.3.1 to 15.2