In the menus, most shortcuts are listed using the ctrl key as the only modifier (likely an automatic artifact from macOS's cmd). Some examples:

• Copy ctrl+c
• Paste ctrl+v
• Close tab ctrl+w
• New tab ctrl+t

These shortcuts don't work, nor should they since they are essential shortcuts used within the shell. Copy and paste seem to work with the usual ctrl+shift+c/v, but I couldn't find working versions of any others in my few minutes of guessing.