Cannot delete 'online only' files from trash (Mac)

I have this recurring problem on my Mac where I can't empty my trash properly because of some online-only files that are in there.

When I try to empty my trash, I get the following error:

• The Finder can’t complete the operation because some data in “FILENAME” can’t be read or written.
  (Error code -36)

I've also tried undeleting the files and then changing the permissions, but get the following error;

• The operation can’t be completed.
• An unexpected error occurred (error code -36).

This has happened with a number of files, and also used to happen on my old Mac, with a different version of MacOS.

Any ideas?