How can I enable the "Missing article" rule when running my own server?

I tried LanguageTool and it’s great. I installed my own LanguageTool server with the n-gram data. When I check my text with the Cloud Server, the grammar check gives me a “Missing article” warning, but this “Missing article” warning does not show up when I run my own server?

The line I’m checking is this, “The current line is at center of window.” How can I enable the “Missing article” rule when running my own server?

Hi, that rule is not part of the stand-alone version, and cannot be activated for it.

Thank you for clearing that up.