Error during uninstallation

  • when I go to deactivate your plugin gives me this error:

    Notice: has_cap was called with an argument That is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in / home/sandroy2j85/public_html/wp-includes/functions.php on line 3193

    how can I fix it?

    please, I need your support.

    https://www.ads-software.com/plugins/tt-post-viewer/

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