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Open a post to edit it. Go to blocksy theme post/page options on right side and try to change from my default blocksy single post setting (right-sidebar) to normal width option with no sidebar.
However when trying to update the page, we get a wordpress error pink bar at top that says “Updating failed. The response is not a valid JSON response.”
This is new, never seen this error before doing the exact same thing on mulitple pages/posts on multiple sites using Blocksy theme.
Any ideas? Please advise.