The widget Mag_Builder_category_block_1 is not available. Please try locate and install the missing plugin. Post on the support forums if you need help. Can you help me locate them?
Widget missing
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Hi SMnoticias Argentina
Thanks for reaching out.
Documentation reference: Page: Troubleshooting Errors.
Widgets or themes can add widgets to WordPress. If a widget is missing, the theme or plugin has most likely been deactivated. Is Mag Builder looks like a plugin, is still activated?