Problem overview:

The code is determined to be bug-free, but it cannot run after switching to a new environment or git from a remote warehouse.

Development environment:

IDEA

reason:

Because idea may have problems recognizing folder types. Especially when there are many switching spaces, GIT codes and new modules. We just need to set the folder type correctly.

Solution:

Set the Resources folder as a resource folder. If there are problems with other folders, the same is true.

After setting, the folder icon changes, indicating success.