Setting import-map.json to Import Map，after clear the path of it, it still occur error in the packing

[tangkaikk]

Cocos Creator version

3.x

System information

All

Issue description

Setting import-map.json to Import Map，after clear the path of it, during the packing it still occur error "Failed to load import map at project://: Error: EISDIR: illegal operation on a directory, read"

Relevant error log output

"Failed to load import map at project://: Error: EISDIR: illegal operation on a directory, read"

Steps to reproduce

1.set a path of Import Map in the project setting -> Scripting 2.cleat the path of Import Map 3.make the web-destop packing

Minimal reproduction project

prefabPackDifferent.zip