I got the same issue,
Could you check the demo that you uploaded, this is from where I got the error try launching the demo
The demo version seems to work fine. Is there some other step to reproduce the error? I'm using version 9.2.2
not sure what the issue is
but I am using the zip file mz3d-project-demo 9.2.2
try downloading it using the file you provided.
maybe you have a different developed version.
Hello, I also have the same problem. Personal judgment should be that your RPG MZ version is too low. This error disappeared after I upgraded my own RPG MZ to 1.4.3. hope this helps!