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Paste the code to your Oxygen Builder website’s HTML field.
Next, go to your Oxygen Builder website editor and find the HTML field. It is most likely in the form of an HTML/Code widget or module which you can find on the Oxygen Builder’s editor. Add it to your page, and paste the RSVP Form Embed Code you’ve copied before to the HTML field.
Save and update, and that’s it, you should have Common Ninja’s RSVP Form plugin on your Oxygen Builder website.