The file is an outdated Add-On that cannot be used with this Archicad version.

[LeeJaeYoung]

I copied the apx created in window 10 to window 11
By the way
I'm getting this error message
What is the difference between window 11 apx and window 10 apx?

[BerndSchwarzenbacher]

Hi,

This error message can be due to several things. Can you give more details about your AC versions and build settings?
I haven't tried running my Add-Ons on Windows 11 yet, so take my advice with a grain of salt. Anyway I would check the following:
* Is the Add-On compiled for the correct Archicad version

* It might be that you have to use a newer Windows SDK while building the Add-On
* Some other library you link to was build against an old Windows SDK

[LeeJaeYoung]

I solved it by compiling again with windows 11 sdk.