Nothing is actually going wrong with the intended process but errors are showing. Not sure of cause:
Example when renaming a_3.tres to new_atlas_texture_3.tres
Cannot open file 'res://Player/a_3.tres'.
Failed loading resource: res://Player/a_3.tres. Make sure resources have been imported by opening the project in the editor at least once.
Error loading resource: 'res://Player/a_3.tres'.
Nothing is actually going wrong with the intended process but errors are showing. Not sure of cause:
Example when renaming a_3.tres to new_atlas_texture_3.tres