invalid block every time i copy and paste a block

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I have installed the editor plus plugin and im using gutenberg hub to copy/paste the code ie https://gutenberghub.com/templates/content-21/ via the blue copy code button
Then i go to editorplus in my wordpress and Add Block, a popup appears, i paste the code, i cann see the code and when i try to save it says invalid block.

am i doing anything wrong? Same happens with any code ….

Thanks,
Iris