According to the document, an error is reported when using 2D radiographic testing.
Official document
reason
At least one object in the scene must have both RigidBody and Colliders.
resolvent
Add RigidBodyand Colliders to the object to be detected at the same time
Background
Cocos creator compilation engine NPM install reports errors
error contents:
fetchMetadata: sill pacote range manifest for path-root@^0.1.1 fetched in 194ms
Solution:
The effective scheme is as follows:
npm config set registry http://registry.npmjs.org/ --global
npm cache clear --force
npm install --verbose
Type 
I found that many developers have encountered this problem recently. I’ll share it. I check this error.
As shown in Figure
I can’t seem to see where UUID is wrong!!!
Solution:
Let’s open cocos creator from the command line and choose to open your project. At this time, the command line will report an error message. When you see the error message, it indicates that there is an error in a meta file. You can directly look at the meta file and solve it easily.