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Theme Options > Footer > Show footer demo blocks > Off. Go to Appearance > Widgets > edit content of Footer or Copyrights areas.
Read more – https://xstore.helpscoutdocs.com/article/48-widgets-custom-widget-areas https://youtu.be/1Nu49dskD1Q
Or provide us with URL and temporary wp-admin access, so I can check your site http://prntscr.com/onax43
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