Apple support website question
Why does every time I post I get this “Your post could not be saved. Please try again in a few moments.” Waiting a few minutes accomplishes nothing.
iPad Air 3 Wi-Fi
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This error generally indicates a problem with a saved cookie. Simply refreshing the page will often resolve the issue.
Otherwise, you can manually clear the offending cookie from iPad settings:
Settings > Safari > Advanced > Website Data
Use the Search field at the top of the window to find Apple.com; from the list, swipe to the left to expose the red Delete button.