If you are having trouble with copy/paste functionality on the canvas as well as table, you should check if Planera app has permission to access browser clipboard.
Allow global access
Open Chrome browser Settings.
Select Security & Privacy > Site Settings > Permissions > Clipboard.
Select Allow.
Allow domain-specific access
This action is not necessary if you have enabled global access to your clipboard.
Go to the browser setting for the clipboard (chrome://settings/content/clipboard).
In Allowed to see your clipboard make sure the https://app.planera.io:443 domain is listed.