Cut, Copy, & Paste greyed out Mac Mail on High Sierra
The Cut, Copy, Paste, and several other options are greyed out in Mac Mail on my iMac running High Sierra, macOS 10.13.3. Cmd C, and Cmd V no longer work either when I select several mail messages and attempt to copy them to a folder on iCloud. Copying locally to a folder on my iMac doesn't work either.
Has anyone else encountered this problem and found a fix?