The sidebar below content error in WordPress is followed by three different causes.
1- You add a new plugin, or make some changes on the layout of the page.
2-Unclosed <div> tag found in your page, or extra closing </div> tag in the page that puts sidebar outside the main wrap container
3- Issue with float settings or width in CSS
In order to fix the error, you can try using the following steps:
Just undo the most recent changes
Fix unclosed or Extra closing DIV tags
Fix CSS Issues
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