The project.json field in the.sb3 file is missing. After importing the file, the scratch3 environment cannot parse the file and an error is reported when the emitWorkspaceUpdate method is called internally.

[oicoderr]

The project.json field in the.sb3 file is missing. After importing the file, the internal virtual-machine.js calls the emitWorkspaceUpdate method, and the scratch3 environment cannot parse the file and reports an error.

here is that file for this problem
cai.zip