Cannot copy and paste workflow/nodes within same project

When selecting multiple nodes or even one node, I cannot copy and paste the nodes within the same project.

Error occurs when using both the keyboard shortcut and right-clicking to select the copy and paste field from the popup menu.

I have been using KNIME on PC prior to this and never encountered this issue however I just moved to Mac and this has been happening on and off since the switch.

Has anyone seen this before? Hoping its just some form of user error…