This mod doesn't really depends on amecsapi. It can be removed safely.
It's causing some conflict issues because of Mixins in amecsapi. (e.g. Nova-Committee/ModernKeyBinding#7)
Also this line is pointless since amecsapi is embedded.

Fix

Change modImplementation to modRuntimeOnly, and remove include.

Fabric/build.gradle

dependencies {
    ...

+    modRuntimeOnly "de.siphalor:amecsapi-1.20:1.5.0+mc1.20-pre1"
-    modImplementation "de.siphalor:amecsapi-1.20:1.5.0+mc1.20-pre1"
-    include "de.siphalor:amecsapi-1.20:1.5.0+mc1.20-pre1"
}