Hi,
Thank you for using Mighty Addons and apologies for the delay.
I just tested the plugin on two separate installations, one with Elementor Free Version and another with the Elementor Pro.
I was able to use copy/paste and copy all/paste all without any problem.
Can you check the console once, if there’s any error or some other plugin may be conflicting with ours?
Let me know.
Thanks,
Akash