I am trying to create an advert that will expand past the side of the page. Using the GPT Safeframe preview tool I am receiving the error \"Invalid EXPAND_REQUEST message. Reaso
unfortunately, it's not possible to avoid this behaviour, but i made a workaround, that will "wait", until user is scrolled in place, that is suitable to expand, check this example, that will push banner from bottom, when user have enought space from bottom to expand whole creative:
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hope it helps!
edit:
I found better solution here: Unable to access contents of a safeframe returned by Google adx