Symptoms
When trying to import from Google Drive, the following error is shown:
The resource requested was not found by Google Drive.
Error code
Any error code ending in -242
Details
Here is what Google has to say on this error:
404: File not found: {fileId}
The user does not have read access to a file, or the file does not exist.
Solution
Make sure that the file exists, and if it does, you must ask the owner to add your user to the file permissions in order to migrate it.