Not an issue with the mod itself(that is, not one that hasn't already been fixed), but an issue with the Curseforge page. Issue #61 #61 (comment) has a closing reply stating the issue was fixed as of version 4.1.0, and that said files would be uploaded to the Curseforge page.

This was 4 months ago, and even as of today's date (12/19/2024), the latest accessible file is 4.0.2

Another issue is the mod seems to require a version of ACsGuis(1.2.12) that doesn't exist anywhere that I know to look(the curseforge page for it nor the github for it has the file). Removing the file before opening the game gives the same response(I thought I had read something about this mod automatically downloading ACsGuis, but I guess I misread something).

Sidenote, I did find the file for ACsGuis on the files.dynamx page you posted to issue 61, so I suppose the only real issue is all these files aren't on Curseforge yet(four months later lmao).

Hello, thanks for that issue, I guess we can consider this as a real "issue" since the last release was a long time ago.
We had a lot of plans for 4.1.0, things were added along the development, so developing this version took a while. Now we are, since a few months, in a "stabilization" phase, to have a good and stable version to give, with new little improvements and bug fixing.
As we are all busy in our lives, this takes time and that's why it hasn't been released yet. I hope to release it before the end of January.

On https://files.dynamx.fr/addons/, you can find the latests version of DynamX 4.1.0, that are stable and usable. The corresponding files for ACsGuis are there, 1.2.13 for DynamX 4.1.0 beta1, 1.3.0-dev8 for the most recent versions of DynamX.
ACsGuis should download automatically if not installed yet, but it may not work on some intermediate versions.