Can't copy/paste from one board to another

I have created 3 boards in which I have consolidated answers from different user groups on a frame. I am trying to copy these frames with the sticky notes to a “general” board so I can compare and work from there to show the client an overview. I’ve tried using command + c / command + v, as well as the triple dot → copy / right-click → paste flows, but neither works.  Both those methods work fine when I’m copying and pasting on the same board. 

But, I cannot copy and paste between the boards, nothing at all. Not the frames, not the individual sticky notes. I have checked and I am in my shared team account, the boards are in the same “project”. I found these articles but the solutions simply don’t work. I cannot duplicate the boards and work from a duplicate because I have 3 of them (with a lot of information) so I will loose information either way, and I don’t feel like typing over 100+ stickies x 3. 

Does anybody know how I can copy a frame to another Miro board?

Found answers that are not working:

https://community.miro.com/got-a-question-ask-the-community-45/copy-asset-from-one-board-to-another-522

https://community.miro.com/ask-the-community-45/copying-frames-from-different-templates-to-a-new-board-3985

https://community.miro.com/ask-the-community-45/can-t-copy-paste-from-one-board-to-another-2468